Urs polar (Romanian Wikipedia)
Analysis of information sources in references of the Wikipedia article "Urs polar" in Romanian language version.
refsWebsite
Global rank
Romanian rank
1st place
1st place
6th place
23rd place
low place
9,337th place
5th place
11th place
3,395th place
1,049th place
18th place
27th place
3rd place
6th place
120th place
137th place
88th place
26th place
274th place
262nd place
low place
low place
387th place
117th place
low place
low place
733rd place
252nd place
163rd place
104th place
1,053rd place
1,081st place
low place
low place
low place
low place
low place
low place
1,670th place
1,146th place
7th place
25th place
low place
low place
low place
5,034th place
low place
low place
low place
low place
low place
low place
low place
low place
3,600th place
9,927th place
low place
7,644th place
139th place
416th place
1,067th place
462nd place
768th place
6,279th place
3,410th place
2,799th place
1,299th place
825th place
11th place
638th place
234th place
260th place
1,859th place
872nd place
137th place
326th place
5,061st place
8,887th place
818th place
3,956th place
low place
low place
34th place
147th place
344th place
184th place
6,607th place
low place
low place
low place
808th place
422nd place
low place
low place
low place
low place
4,411th place
37th place
6,485th place
low place
low place
5,768th place
low place
low place
low place
low place
73rd place
629th place
abc.net.au
- „Why do fat polar bears have healthy hearts? › News in Science (ABC Science)”, Abc.net, accesat în
animaldiversity.org
archive.org
- Stirling, Ian (). „The First Polar Bears”. Polar Bears. Ann Arbor: University of Michigan Press. ISBN 978-0-472-10100-9.
- Stirling, Ian (). „Introduction”. Polar Bears. Ann Arbor: University of Michigan Press. ISBN 978-0-472-10100-9.
- Stirling, Ian (). „Distribution and Abundance”. Polar Bears. Ann Arbor: University of Michigan Press. ISBN 978-0-472-10100-9.
- Hemstock, p. 4 Hemstock, Annie (). The Polar Bear. Manakato, MN: Capstone Press. ISBN 978-0-7368-0031-0.
- Wood, G.L. (). The Guinness Book of Animal Records. Enfield, Middlesex : Guinness Superlatives. p. 240. ISBN 978-0-85112-235-9.
- Lockwood, pp. 10–16 Lockwood, Sophie (). Polar Bears. Chanhassen, MN: The Child's World. ISBN 978-1-59296-501-4.
- „Marine mammals of the world : a comprehensive guide to their identification : Jefferson, Thomas A : Free Download, Borrow, and Streaming : Internet Archive”, Internet Archive, accesat în
- Stirling, Ian (). „behavior”. Polar Bears. Ann Arbor: University of Michigan Press. ISBN 978-0-472-10100-9.
- Stirling, Ian (). „Distribution and Abundance”. Polar Bears. Ann Arbor: University of Michigan Press. ISBN 978-0-472-10100-9.
- Hemstock, pp. 24–27 Hemstock, Annie (). The Polar Bear. Manakato, MN: Capstone Press. ISBN 978-0-7368-0031-0.
- Stirling, Ian (). „What Makes a Polar Bear Tick?”. Polar Bears. Ann Arbor: University of Michigan Press. ISBN 978-0-472-10100-9.
- Stirling, Ian (). Polar Bears. Ann Arbor: University of Michigan Press. ISBN 978-0-472-10100-9.
- Stirling, Ian (). „Reproduction”. Polar Bears. Ann Arbor: University of Michigan Press. ISBN 978-0-472-10100-9.
- Lockwood, pp.17–21 Lockwood, Sophie (). Polar Bears. Chanhassen, MN: The Child's World. ISBN 978-1-59296-501-4.
- Hemstock, pp. 29–35 Hemstock, Annie (). The Polar Bear. Manakato, MN: Capstone Press. ISBN 978-0-7368-0031-0.
- „The polar bear : Hemstock, Annie Wendt : Free Download, Borrow, and Streaming : Internet Archive”, Internet Archive, accesat în
- „World of the polar bear : Bruemmer, Fred : Free Download, Borrow, and Streaming : Internet Archive”, Internet Archive, accesat în
- „Polar bears : Stirling, Ian : Free Download, Borrow, and Streaming : Internet Archive”, Internet Archive, accesat în
- Arctic Climate Impact Assessment (). Impact of a Warming Arctic: Arctic Impact Climate Assessment: Key Finding 4
. Cambridge: Cambridge University Press. ISBN 978-0-521-61778-9. OCLC 56942125.. - Lockwood, pp. 6–9 Lockwood, Sophie (). Polar Bears. Chanhassen, MN: The Child's World. ISBN 978-1-59296-501-4.
- Lockwood, pp. 31–36 Lockwood, Sophie (). Polar Bears. Chanhassen, MN: The Child's World. ISBN 978-1-59296-501-4.
- Stirling, Ian (). „The Original Polar Bear Watchers”. Polar Bears. Ann Arbor: University of Michigan Press. ISBN 978-0-472-10100-9.
- Dabcovich, Lydia (). The polar bear son: An Inuit tale. New York: Clarion Books. ISBN 978-0-395-72766-9.
basicbiology.net
- Purcell, Adam. „Carnivora”. Basic Biology. Arhivat din original la .
bbc.com
- „Climate change: Polar bears could be lost by 2100”. BBC News. . Accesat în .
bearbiology.com
- Wilson, Don E. (). „Cranial variation in polar bears” (PDF). Bears: Their Biology and Management. 3: 447–453. doi:10.2307/3872793. JSTOR 3872793. Arhivat din original (PDF) la . Accesat în .
biodiversitylibrary.org
- Phipps, John (). A voyage towards the North Pole undertaken by His Majesty's command, 1773. London: W. Bowyer and J. Nicols, for J. Nourse. p. 185. Arhivat din original la . Accesat în .
biorxiv.org
- Malenfant, René M.; Coltman, David W.; Richardson, Evan S.; Lunn, Nicholas J.; Stirling, Ian; Adamowicz, Elizabeth; Davis, Corey S. (). „Evidence of adoption, monozygotic twinning, and low inbreeding rates in a large genetic pedigree of polar bears” (PDF). Polar Biology. 39 (8): 1455–1465. doi:10.1007/s00300-015-1871-0.
books.google.com
- Stirling, Ian; Guravich, Dan (). Polar Bears. University of Michigan Press. p. 191. ISBN 978-0-472-08108-0.
- Bernd G. Würsig; J. G. M. Hans Thewissen (). Encyclopedia of Marine Mammals. Gulf Professional Publishing. p. 70. ISBN 978-0-12-551340-1.
- Perrin, William F.; Bernd Würsig; J. G. M. Thewissen (). Encyclopedia of Marine Mammals (ed. 2nd). San Diego, CA: Academic Press. p. 1009. ISBN 978-0-12-373553-9.
bowdoinorient.com
- „The Bowdoin polar bear: origins in a history of exploration”. . Accesat în .
bucknell.edu
departments.bucknell.edu
- Wozencraft, W.C. (). „Order Carnivora”. În Wilson, D.E.; Reeder, D.M. Mammal Species of the World: A Taxonomic and Geographic Reference (ed. 3rd). Johns Hopkins University Press. p. 589. ISBN 978-0-8018-8221-0. OCLC 62265494.
canlii.org
- „Order Authorizing the Issue of a Two Dollar Circulation Coin Commemorating the Millennium and Specifying its Characteristics, SOR/2000-245”. CanLII. . Arhivat din original la . Accesat în .
cgsociety.org
- „The Golden Compass: The Bear Facts”. CG Society. Arhivat din original la . Accesat în .
churchillpolarbears.org
- „Arctic Wildlife”. Churchill Polar Bears. . Accesat în .
coca-cola.co.uk
- „Our Coca-Cola Polar bears”. Coca-Cola. Arhivat din original la . Accesat în .
collinsdictionary.com
- „Definition of 'white bear'”. Collins English Dictionary. Glasgow, Scotland: HarperCollins Publishers LLC. Arhivat din original la . Accesat în .
csic.es
digital.csic.es
- Hailer, F.; Kutschera, V. E.; Hallstrom, B. M.; Klassert, D.; Fain, S. R.; Leonard, J. A.; Arnason, U.; Janke, A. (). „Nuclear Genomic Sequences Reveal that Polar Bears Are an Old and Distinct Bear Lineage” (PDF). Science. 336 (6079): 344–7. Bibcode:2012Sci...336..344H. doi:10.1126/science.1216424. PMID 22517859.
ctvnews.ca
- Brooke Taylor (), „Polar bears use rocks and ice as weapons to kill walruses: study”, CTVNews, accesat în
defenders.org
- „Basic Facts About Polar Bears”. Defenders of Wildlife. . Accesat în .
discovery.com
news.discovery.com
- Polar Bear Attacks Surprisingly Rare. Kieran Mulvaney, Discovery News. 5 August 2011.
doi.org
- Ingólfsson, Ólafur; Wiig, Øystein (). „Late Pleistocene fossil find in Svalbard: the oldest remains of a polar bear (Ursus maritimus Phipps, 1744) ever discovered”. Polar Research. 28 (3). doi:10.3402/polar.v28i3.6131. ISSN 0800-0395. Arhivat din original la . Accesat în .
- Wiig, Ø.; Amstrup, S.; Atwood, T.; Laidre, K.; Lunn, N.; Obbard, M.; Regehr, E.; Thiemann, G. (). „Ursus maritimus”. IUCN Red List of Threatened Species. 2015: e.T22823A14871490. doi:10.2305/IUCN.UK.2015-4.RLTS.T22823A14871490.en
. Accesat în . - Nakagome, Shigeki; et al. (). „Unequal Rates of Y Chromosome Gene Divergence during Speciation of the Family Ursidae”. Molecular Biology and Evolution. 25 (7): 1344–1356. doi:10.1093/molbev/msn086 . PMID 18400788.
- Wayne, R. K.; Van Valkenburgh, B.; O'Brien, S. J. (). „Molecular distance and divergence time in carnivores and primates”. Molecular Biology and Evolution. 8 (3): 297–319. doi:10.1093/oxfordjournals.molbev.a040651 . PMID 2072860.
- Lindqvist, C.; Schuster, S. C.; Sun, Y.; Talbot, S. L.; Qi, J.; Ratan, A.; Tomsho, L. P.; Kasson, L.; Zeyl, E.; Aars, J.; Miller, W.; Ingolfsson, O.; Bachmann, L.; Wiig, O. (). „Complete mitochondrial genome of a Pleistocene jawbone unveils the origin of polar bear”. Proceedings of the National Academy of Sciences. 107 (11): 5053–7. Bibcode:2010PNAS..107.5053L. doi:10.1073/pnas.0914266107 . PMC 2841953 . PMID 20194737.
- DeMaster, Douglas P.; Stirling, Ian (). „Ursus maritimus”. Mammalian Species. 145 (145): 1–7. doi:10.2307/3503828 . JSTOR 3503828. OCLC 46381503.
- Waits, L. P.; Talbot, S. L.; Ward, R. H.; Shields, G. F. (). „Mitochondrial DNA Phylogeography of the North American Brown Bear and Implications for Conservation”. Conservation Biology. 12 (2): 408–417. doi:10.1111/j.1523-1739.1998.96351.x. JSTOR 2387511.
- Edwards, C. J.; Suchard, M. A.; Lemey, P.; Welch, J. J.; Barnes, I.; Fulton, T. L.; Barnett, R.; O'Connell, T. C.; Coxon, P.; Monaghan, N.; Valdiosera, C. E.; Lorenzen, E. D.; Willerslev, E.; Baryshnikov, G. F.; Rambaut, A.; Thomas, M. G.; Bradley, D. G.; Shapiro, B. (). „Ancient Hybridization and an Irish Origin for the Modern Polar Bear Matriline”. Current Biology. 21 (15): 1251–8. doi:10.1016/j.cub.2011.05.058. PMC 4677796 . PMID 21737280.
- Hailer, F.; Kutschera, V. E.; Hallstrom, B. M.; Klassert, D.; Fain, S. R.; Leonard, J. A.; Arnason, U.; Janke, A. (). „Nuclear Genomic Sequences Reveal that Polar Bears Are an Old and Distinct Bear Lineage” (PDF). Science. 336 (6079): 344–7. Bibcode:2012Sci...336..344H. doi:10.1126/science.1216424. PMID 22517859.
- Liu, Shiping; Lorenzen, Eline D.; Fumagalli, Matteo; Li, Bo; Harris, Kelley; Xiong, Zijun; Zhou, Long; Korneliussen, Thorfinn Sand; Somel, Mehmet; Babbitt, Courtney; Wray, Greg; Li, Jianwen; He, Weiming; Wang, Zhuo; Fu, Wenjing; Xiang, Xueyan; Morgan, Claire C.; Doherty, Aoife; O'Connell, Mary J.; McInerney, James O.; Born, Erik W.; Dalén, Love; Dietz, Rune; Orlando, Ludovic; Sonne, Christian; Zhang, Guojie; Nielsen, Rasmus; Willerslev, Eske; Wang, Jun (). „Population Genomics Reveal Recent Speciation and Rapid Evolutionary Adaptation in Polar Bears”. Cell. 157 (4): 785–794. doi:10.1016/j.cell.2014.03.054. PMC 4089990 . PMID 24813606.
- Wilson, Don E. (). „Cranial variation in polar bears” (PDF). Bears: Their Biology and Management. 3: 447–453. doi:10.2307/3872793. JSTOR 3872793. Arhivat din original (PDF) la . Accesat în .
- Paetkau, D.; Amstrup, S. C.; Born, E. W.; Calvert, W.; Derocher, A. E.; Garner, G. W.; Messier, F.; Stirling, I.; et al. (). „Genetic structure of the world's polar bear populations” (PDF). Molecular Ecology. 8 (10): 1571–1584. doi:10.1046/j.1365-294x.1999.00733.x. PMID 10583821. Accesat în – via ResearchGate.
- Derocher, Andrew E.; Lunn, Nicholas J.; Stirling, Ian (). „Polar bears in a Warming Climate”. Integrative and Comparative Biology. 44 (2): 163–176. doi:10.1093/icb/44.2.163 . PMID 21680496.
- Stirling, Ian (ianuarie 1997). „The importance of polynyas, ice edges, and leads to marine mammals and birds”. Journal of Marine Systems. 10 (1–4): 9–21. Bibcode:1997JMS....10....9S. doi:10.1016/S0924-7963(96)00054-1.
- Derocher, A. E.; Wiig, Ø. (). „Postnatal growth in body length and mass of polar bears (Ursus maritimus) at Svalbard”. Journal of Zoology. 256 (3): 343–349. doi:10.1017/S0952836902000377.
- Ferguson, S. H.; Taylor, M. K.; Born, E. W.; Rosing-Asvid, A.; Messier, F. (). „Determinants of Home Range Size for Polar Bears (Ursus maritimus)”. Ecology Letters. 2 (5): 311–318. doi:10.1046/j.1461-0248.1999.00090.x. PMID 33810629.
- Liu, S; Lorenzen, ED; Fumagalli, M; et al. (). „Population genomics reveal recent speciation and rapid evolutionary adaptation in polar bears”. Cell. 157 (4): 785–794. doi:10.1016/j.cell.2014.03.054. PMC 4089990 . PMID 24813606.
- Derocher, Andrew E.; Magnus Andersen; Øystein Wiig (). „Sexual dimorphism of polar bears” (PDF). Journal of Mammalogy. 86 (5): 895–901. doi:10.1644/1545-1542(2005)86[895:SDOPB]2.0.CO;2 . JSTOR 4094434. Arhivat din original (PDF) la .
- Pagano, A. Am (). „Long-distance swimming by polar bears (Ursus maritimus) of the southern Beaufort Sea during years of extensive open water”. Canadian Journal of Zoology. 90 (5): 663–676. doi:10.1139/z2012-033 .
- Durner, George M.; et al. (). „Consequences of long-distance swimming and travel over deep-water pack ice for a female polar bear during a year of extreme sea ice retreat”. Polar Biology. 34 (7): 975–984. doi:10.1007/s00300-010-0953-2.
- Owen, M. A.; Swaisgood, R. R.; Slocomb, C.; Amstrup, S. C.; Durner, G. M.; Simac, K.; Pessier, A. P. (). „An experimental investigation of chemical communication in the polar bear”. Journal of Zoology. 295 (1): 36–43. doi:10.1111/jzo.12181.
- Dyck, M. G.; Romberg, S. (). „Observations of a wild polar bear (Ursus maritimus) successfully fishing Arctic charr (Salvelinus alpinus) and Fourhorn sculpin (Myoxocephalus quadricornis)”. Polar Biology. 30 (12): 1625–1628. doi:10.1007/s00300-007-0338-3.
- Best, R. C. (). „Digestibility of ringed seals by the polar bear”. Can. J. Zool. 63 (5): 1033–1036. doi:10.1139/z85-155.
- Calvert, Wendy; Stirling, Ian (). „Interactions between polar bears and overwintering walruses in the Central Canadian High Arctic”. Bears: Their Biology and Management. A Selection of Papers from the Eighth International Conference on Bear Research and Management, Victoria, British Columbia, Canada, February 1989. 8: 351–356. doi:10.2307/3872939. JSTOR 3872939.
- Cesare, Chris (). „Polar bear metabolism cannot cope with ice loss”. Nature. doi:10.1038/nature.2015.17992. Accesat în .
- Russell, Richard H. (). „The Food Habits of Polar Bears of James Bay and Southwest Hudson Bay in Summer and Autumn”. Arctic. 28 (2): 117–129. doi:10.14430/arctic2823.
- Gormezano, Linda J.; Rockwell, Robert F. (). „What to eat now? Shifts in polar bear diet during the ice-free season in western Hudson Bay”. Ecology and Evolution. 3 (10): 3509–3523. doi:10.1002/ece3.740. PMC 3797495 . PMID 24223286.
- Brook, R. K.; Richardson, E. S. (). „Observations of Polar Bear Predatory Behaviour toward Caribou”. Arctic. 55 (2): 193–196. doi:10.14430/arctic703.
- Ramsay, M. A.; Hobson, K. A. (mai 1991). „Polar bears make little use of terrestrial food webs: evidence from stable-carbon isotope analysis”. Oecologia. 86 (4): 598–600. Bibcode:1991Oecol..86..598R. doi:10.1007/BF00318328. PMID 28313343.
- Best, R. C. (). „Digestibility of ringed seals by the polar bear”. Canadian Journal of Zoology. 63 (5): 1033–1036. doi:10.1139/z85-155.
- Bruce, D. S.; Darling, N. K.; Seeland, K. J.; Oeltgen, P. R.; Nilekani, S. P.; Amstrup, S. C. (). „Is the polar bear (Ursus maritimus) a hibernator?: Continued studies on opioids and hibernation”. Pharmacology Biochemistry and Behavior. 35 (3): 705–711. doi:10.1016/0091-3057(90)90311-5. PMID 2339159.
- Malenfant, René M.; Coltman, David W.; Richardson, Evan S.; Lunn, Nicholas J.; Stirling, Ian; Adamowicz, Elizabeth; Davis, Corey S. (). „Evidence of adoption, monozygotic twinning, and low inbreeding rates in a large genetic pedigree of polar bears” (PDF). Polar Biology. 39 (8): 1455–1465. doi:10.1007/s00300-015-1871-0.
- Derocher, AE; Wiig, Ø. (). „Infanticide and Cannibalism of Juvenile Polar Bears (Ursus maritimus) in Svalbard” (PDF). Arctic. 52 (3): 307–310. CiteSeerX 10.1.1.491.140 . doi:10.14430/arctic936. Arhivat din original (PDF) la . Accesat în .
- Rodahl, K.; Moore, T. (). „The vitamin A content and toxicity of bear and seal liver”. The Biochemical Journal. 37 (2): 166–168. doi:10.1042/bj0370166. PMC 1257872 . PMID 16747610.
- Stirling, Ian; Lunn, N. J.; Iacozza, J. (septembrie 1999). „Long-term trends in the population ecology of polar bears in Western Hudson Bay in relation to climatic change” (PDF). Arctic. 52 (3): 294–306. doi:10.14430/arctic935. Arhivat din original (PDF) la . Accesat în .
- Monnett, Charles; Gleason, Jeffrey S. (iulie 2006). „Observations of mortality associated with extended open-water swimming by polar bears in the Alaskan Beaufort Sea” (PDF). Polar Biology. 29 (8): 681–687. doi:10.1007/s00300-005-0105-2. Arhivat din original (PDF) la .
- Stirling, Ian; Parkinson, Claire L. (septembrie 2006). „Possible effects of climate warming on selected populations of polar bears (Ursus maritimus) in the Canadian Arctic” (PDF). Arctic. 59 (3): 261–275. doi:10.14430/arctic312. ISSN 0004-0843. Accesat în .
- Stirling, Ian; Derocher, Andrew E. (). „Melting Under Pressure: The Real Scoop on Climate Warming and Polar Bears” (PDF). The Wildlife Professional. 1 (3): 24–27, 43. doi:10.4004/1933-2866(2007)1[24:MUP]2.0.CO;2. Arhivat din original (PDF) la . Accesat în .
- Regehr, Eric V.; Lunn, Nicholas J.; Amstrup, Steven C.; Stirling, Ian (). „Effects of earlier sea ice breakup on survival and population size of polar bears in western Hudson Bay”. Journal of Wildlife Management. 71 (8): 2673–2683. doi:10.2193/2006-180.
fantasticfiction.co.uk
- East (2003), A novel by Edith Pattou, Fantastic Fiction
fws.gov
- „Polar bear, (Ursus maritimus)” (PDF). United States Fish and Wildlife service. Arhivat din original (PDF) la . Accesat în .
Appearance. The polar bear is the largest member of the bear family, with the exception of Alaska's Kodiak bears, which equal polar bears in size.
- Schliebe, Scott; Evans, Thomas; Johnson, Kurt; Roy, Michael; Miller, Susanne; Hamilton, Charles; Meehan, Rosa; Jahrsdoerfer, Sonja (). Range-wide status review of the polar bear (Ursus maritimus) (PDF). Anchorage, Alaska: United States Fish and Wildlife Service. Arhivat din original (PDF) la . Accesat în .
- „Polar bear, (Ursus maritimus)” (PDF). United States Fish and Wildlife service. Arhivat din original (PDF) la . Accesat în .
Appearance. The polar bear is the largest member of the bear family, with the exception of Alaska's Kodiak brown bears, a brown bear subspecies, which equal polar bears in size.
gocheckers.com
- „Charlotte Checkers Chubby”. Accesat în .
google.com
- Wozencraft, W.C. (). „Order Carnivora”. În Wilson, D.E.; Reeder, D.M. Mammal Species of the World: A Taxonomic and Geographic Reference (ed. 3rd). Johns Hopkins University Press. p. 589. ISBN 978-0-8018-8221-0. OCLC 62265494.
grandquebec.com
- .„Ours polaire” [Polar bear]. Grand Quebec (în franceză). Accesat în .
harvard.edu
adsabs.harvard.edu
- Lindqvist, C.; Schuster, S. C.; Sun, Y.; Talbot, S. L.; Qi, J.; Ratan, A.; Tomsho, L. P.; Kasson, L.; Zeyl, E.; Aars, J.; Miller, W.; Ingolfsson, O.; Bachmann, L.; Wiig, O. (). „Complete mitochondrial genome of a Pleistocene jawbone unveils the origin of polar bear”. Proceedings of the National Academy of Sciences. 107 (11): 5053–7. Bibcode:2010PNAS..107.5053L. doi:10.1073/pnas.0914266107 . PMC 2841953 . PMID 20194737.
- Hailer, F.; Kutschera, V. E.; Hallstrom, B. M.; Klassert, D.; Fain, S. R.; Leonard, J. A.; Arnason, U.; Janke, A. (). „Nuclear Genomic Sequences Reveal that Polar Bears Are an Old and Distinct Bear Lineage” (PDF). Science. 336 (6079): 344–7. Bibcode:2012Sci...336..344H. doi:10.1126/science.1216424. PMID 22517859.
- Stirling, Ian (ianuarie 1997). „The importance of polynyas, ice edges, and leads to marine mammals and birds”. Journal of Marine Systems. 10 (1–4): 9–21. Bibcode:1997JMS....10....9S. doi:10.1016/S0924-7963(96)00054-1.
- Ramsay, M. A.; Hobson, K. A. (mai 1991). „Polar bears make little use of terrestrial food webs: evidence from stable-carbon isotope analysis”. Oecologia. 86 (4): 598–600. Bibcode:1991Oecol..86..598R. doi:10.1007/BF00318328. PMID 28313343.
helsinki.fi
helda.helsinki.fi
- Kurtén, B (). „The evolution of the polar bear, Ursus maritimus Phipps”. Acta Zoologica Fennica. 108: 1–30.
icefire.co.uk
- The Fire Within Arhivat în , la Wayback Machine., Chris d'Lacey's official website
icwdm.org
- Clarkson, Peter L.; Stirling, Ian (). „Polar Bears”. În Hygnstrom, Scott E.; Timm, Robert M.; Larson, Gary E. Prevention and Control of Wildlife Damage. Lincoln: University of Nebraska. pp. C–25 to C–34. Arhivat din original (PDF) la . Accesat în .
iucnredlist.org
- Wiig, Ø.; Amstrup, S.; Atwood, T.; Laidre, K.; Lunn, N.; Obbard, M.; Regehr, E.; Thiemann, G. (). „Ursus maritimus”. IUCN Red List of Threatened Species. 2015: e.T22823A14871490. doi:10.2305/IUCN.UK.2015-4.RLTS.T22823A14871490.en . Accesat în .
- „The IUCN Red List of Threatened Species”, IUCN Red List of Threatened Species, accesat în
jstor.org
- DeMaster, Douglas P.; Stirling, Ian (). „Ursus maritimus”. Mammalian Species. 145 (145): 1–7. doi:10.2307/3503828 . JSTOR 3503828. OCLC 46381503.
- Waits, L. P.; Talbot, S. L.; Ward, R. H.; Shields, G. F. (). „Mitochondrial DNA Phylogeography of the North American Brown Bear and Implications for Conservation”. Conservation Biology. 12 (2): 408–417. doi:10.1111/j.1523-1739.1998.96351.x. JSTOR 2387511.
- Wilson, Don E. (). „Cranial variation in polar bears” (PDF). Bears: Their Biology and Management. 3: 447–453. doi:10.2307/3872793. JSTOR 3872793. Arhivat din original (PDF) la . Accesat în .
- Derocher, Andrew E.; Magnus Andersen; Øystein Wiig (). „Sexual dimorphism of polar bears” (PDF). Journal of Mammalogy. 86 (5): 895–901. doi:10.1644/1545-1542(2005)86[895:SDOPB]2.0.CO;2 . JSTOR 4094434. Arhivat din original (PDF) la .
- Calvert, Wendy; Stirling, Ian (). „Interactions between polar bears and overwintering walruses in the Central Canadian High Arctic”. Bears: Their Biology and Management. A Selection of Papers from the Eighth International Conference on Bear Research and Management, Victoria, British Columbia, Canada, February 1989. 8: 351–356. doi:10.2307/3872939. JSTOR 3872939.
- „Cannibalism of a Yearling Polar Bear (Ursus maritimus) at Churchill, Canada on JSTOR”, Jstor.org, accesat în
marinemammalcenter.org
- „Education: Marine Mammal Information: Polar Bears”. The Marine Mammal Center. februarie 2006. Arhivat din original la .
The Inuit name for the polar bear is nanook.
marinemammalscience.org
- Committee on Taxonomy (octombrie 2014). „List of Marine Mammal Species & Subspecies”. The Society for Marine Mammalogy. Arhivat din original la .
mbl.is
icelandmonitor.mbl.is
- „Killing polar bears in Iceland "only logical thing to do"”. Iceland Monitor. . Accesat în .
nasa.gov
- Stirling, Ian; Parkinson, Claire L. (septembrie 2006). „Possible effects of climate warming on selected populations of polar bears (Ursus maritimus) in the Canadian Arctic” (PDF). Arctic. 59 (3): 261–275. doi:10.14430/arctic312. ISSN 0004-0843. Accesat în .
nationalgeographic.com
news.nationalgeographic.com
- Marris, Emma (). „As Sea Ice Shrinks, Can Polar Bears Survive on Land?”. National Geographic. Arhivat din original la . Accesat în .
nationalpost.com
- Hopper, Tristin (). „Two cubs die as mother polar bear turns on her three newborns | National Post”. National Post.
nature.com
- Cesare, Chris (). „Polar bear metabolism cannot cope with ice loss”. Nature. doi:10.1038/nature.2015.17992. Accesat în .
nbcnews.com
- „Fewer polar bear cubs surviving, study finds”, NBC News, accesat în
nih.gov
ncbi.nlm.nih.gov
- Nakagome, Shigeki; et al. (). „Unequal Rates of Y Chromosome Gene Divergence during Speciation of the Family Ursidae”. Molecular Biology and Evolution. 25 (7): 1344–1356. doi:10.1093/molbev/msn086 . PMID 18400788.
- Wayne, R. K.; Van Valkenburgh, B.; O'Brien, S. J. (). „Molecular distance and divergence time in carnivores and primates”. Molecular Biology and Evolution. 8 (3): 297–319. doi:10.1093/oxfordjournals.molbev.a040651 . PMID 2072860.
- Lindqvist, C.; Schuster, S. C.; Sun, Y.; Talbot, S. L.; Qi, J.; Ratan, A.; Tomsho, L. P.; Kasson, L.; Zeyl, E.; Aars, J.; Miller, W.; Ingolfsson, O.; Bachmann, L.; Wiig, O. (). „Complete mitochondrial genome of a Pleistocene jawbone unveils the origin of polar bear”. Proceedings of the National Academy of Sciences. 107 (11): 5053–7. Bibcode:2010PNAS..107.5053L. doi:10.1073/pnas.0914266107 . PMC 2841953 . PMID 20194737.
- Edwards, C. J.; Suchard, M. A.; Lemey, P.; Welch, J. J.; Barnes, I.; Fulton, T. L.; Barnett, R.; O'Connell, T. C.; Coxon, P.; Monaghan, N.; Valdiosera, C. E.; Lorenzen, E. D.; Willerslev, E.; Baryshnikov, G. F.; Rambaut, A.; Thomas, M. G.; Bradley, D. G.; Shapiro, B. (). „Ancient Hybridization and an Irish Origin for the Modern Polar Bear Matriline”. Current Biology. 21 (15): 1251–8. doi:10.1016/j.cub.2011.05.058. PMC 4677796 . PMID 21737280.
- Hailer, F.; Kutschera, V. E.; Hallstrom, B. M.; Klassert, D.; Fain, S. R.; Leonard, J. A.; Arnason, U.; Janke, A. (). „Nuclear Genomic Sequences Reveal that Polar Bears Are an Old and Distinct Bear Lineage” (PDF). Science. 336 (6079): 344–7. Bibcode:2012Sci...336..344H. doi:10.1126/science.1216424. PMID 22517859.
- Liu, Shiping; Lorenzen, Eline D.; Fumagalli, Matteo; Li, Bo; Harris, Kelley; Xiong, Zijun; Zhou, Long; Korneliussen, Thorfinn Sand; Somel, Mehmet; Babbitt, Courtney; Wray, Greg; Li, Jianwen; He, Weiming; Wang, Zhuo; Fu, Wenjing; Xiang, Xueyan; Morgan, Claire C.; Doherty, Aoife; O'Connell, Mary J.; McInerney, James O.; Born, Erik W.; Dalén, Love; Dietz, Rune; Orlando, Ludovic; Sonne, Christian; Zhang, Guojie; Nielsen, Rasmus; Willerslev, Eske; Wang, Jun (). „Population Genomics Reveal Recent Speciation and Rapid Evolutionary Adaptation in Polar Bears”. Cell. 157 (4): 785–794. doi:10.1016/j.cell.2014.03.054. PMC 4089990 . PMID 24813606.
- Paetkau, D.; Amstrup, S. C.; Born, E. W.; Calvert, W.; Derocher, A. E.; Garner, G. W.; Messier, F.; Stirling, I.; et al. (). „Genetic structure of the world's polar bear populations” (PDF). Molecular Ecology. 8 (10): 1571–1584. doi:10.1046/j.1365-294x.1999.00733.x. PMID 10583821. Accesat în – via ResearchGate.
- Derocher, Andrew E.; Lunn, Nicholas J.; Stirling, Ian (). „Polar bears in a Warming Climate”. Integrative and Comparative Biology. 44 (2): 163–176. doi:10.1093/icb/44.2.163 . PMID 21680496.
- Ferguson, S. H.; Taylor, M. K.; Born, E. W.; Rosing-Asvid, A.; Messier, F. (). „Determinants of Home Range Size for Polar Bears (Ursus maritimus)”. Ecology Letters. 2 (5): 311–318. doi:10.1046/j.1461-0248.1999.00090.x. PMID 33810629.
- Liu, S; Lorenzen, ED; Fumagalli, M; et al. (). „Population genomics reveal recent speciation and rapid evolutionary adaptation in polar bears”. Cell. 157 (4): 785–794. doi:10.1016/j.cell.2014.03.054. PMC 4089990 . PMID 24813606.
- „The effect of body size evolution and ecology on encephalization in cave bears and extant relatives”, PubMed Central (PMC), accesat în
- Gormezano, Linda J.; Rockwell, Robert F. (). „What to eat now? Shifts in polar bear diet during the ice-free season in western Hudson Bay”. Ecology and Evolution. 3 (10): 3509–3523. doi:10.1002/ece3.740. PMC 3797495 . PMID 24223286.
- Ramsay, M. A.; Hobson, K. A. (mai 1991). „Polar bears make little use of terrestrial food webs: evidence from stable-carbon isotope analysis”. Oecologia. 86 (4): 598–600. Bibcode:1991Oecol..86..598R. doi:10.1007/BF00318328. PMID 28313343.
- Bruce, D. S.; Darling, N. K.; Seeland, K. J.; Oeltgen, P. R.; Nilekani, S. P.; Amstrup, S. C. (). „Is the polar bear (Ursus maritimus) a hibernator?: Continued studies on opioids and hibernation”. Pharmacology Biochemistry and Behavior. 35 (3): 705–711. doi:10.1016/0091-3057(90)90311-5. PMID 2339159.
- Rodahl, K.; Moore, T. (). „The vitamin A content and toxicity of bear and seal liver”. The Biochemical Journal. 37 (2): 166–168. doi:10.1042/bj0370166. PMC 1257872 . PMID 16747610.
npolar.no
pbsg.npolar.no
- „Agreements and Conventions”. Polar Bear Specialist Group. Arhivat din original la . Accesat în .
- IUCN Polar Bear Specialist Group, 2017.Summary of polar bear population status Arhivat în , la Wayback Machine..
nwf.org
- „Global Warming and Polar Bears”. National Wildlife Federation. Arhivat din original la . Accesat în .
nytimes.com
- Gorman J (). „Brown bears and polar bears split up, but continued coupling”. The New York Times. Accesat în .
olympic.org
- „Calgary 1988 Mascots”. Accesat în .
pbs.org
- „Arctic Bears”. PBS Nature. . Arhivat din original la .
pnas.org
- „Brain size predicts problem-solving ability in mammalian carnivores”, PNAS, accesat în
polarbearalley.com
- Campbell, Colin; Lunau, Kate (). „The war over the polar bear: Who's telling the truth about the fate of a Canadian icon?”. Maclean's. Arhivat din original la . Accesat în .
polarbearsinternational.org
- Amstrup, Steven C. „Why is polar bear hunting allowed?”. Arhivat din original la . Accesat în .
- Polar Bears and Conservation, arhivat din original la , accesat în
- „Polar bear FAQ”. Polar Bears International. Arhivat din original la . Accesat în .
- Engeli, Emmanuel. „Fractures of the radius and ulna secondary to possible vitamin 'D' deficiency in captive polar bears (Ursus maritimus)”. polarbearsinternational.org. Arhivat din original la .
- „The Polar Bear — Ursus maritimus” (PDF), Polarbearsinternational.org, arhivat din original (PDF) la , accesat în
- Conflicts and Encounters Arhivat în , la Wayback Machine.. Polar Bears International. 2015.
- Wrigley, Robert E. (). „The Oldest Living Polar Bear” (PDF). Polar Bears International Newsletter. Polar Bears International. Arhivat din original (PDF) la . Accesat în .
- „Polar bears in depth: Survival”. Polar Bears International. p. 3. Arhivat din original la .
- Stirling, Ian; Derocher, Andrew E. (). „Melting Under Pressure: The Real Scoop on Climate Warming and Polar Bears” (PDF). The Wildlife Professional. 1 (3): 24–27, 43. doi:10.4004/1933-2866(2007)1[24:MUP]2.0.CO;2. Arhivat din original (PDF) la . Accesat în .
polarresearch.net
- Ingólfsson, Ólafur; Wiig, Øystein (). „Late Pleistocene fossil find in Svalbard: the oldest remains of a polar bear (Ursus maritimus Phipps, 1744) ever discovered”. Polar Research. 28 (3). doi:10.3402/polar.v28i3.6131. ISSN 0800-0395. Arhivat din original la . Accesat în .
psu.edu
citeseerx.ist.psu.edu
- Derocher, AE; Wiig, Ø. (). „Infanticide and Cannibalism of Juvenile Polar Bears (Ursus maritimus) in Svalbard” (PDF). Arctic. 52 (3): 307–310. CiteSeerX 10.1.1.491.140 . doi:10.14430/arctic936. Arhivat din original (PDF) la . Accesat în .
researchgate.net
- Paetkau, D.; Amstrup, S. C.; Born, E. W.; Calvert, W.; Derocher, A. E.; Garner, G. W.; Messier, F.; Stirling, I.; et al. (). „Genetic structure of the world's polar bear populations” (PDF). Molecular Ecology. 8 (10): 1571–1584. doi:10.1046/j.1365-294x.1999.00733.x. PMID 10583821. Accesat în – via ResearchGate.
- Ferguson, S. H.; Taylor, M. K.; Born, E. W.; Rosing-Asvid, A.; Messier, F. (). „Determinants of Home Range Size for Polar Bears (Ursus maritimus)”. Ecology Letters. 2 (5): 311–318. doi:10.1046/j.1461-0248.1999.00090.x. PMID 33810629.
- Derocher AE, Wiig Ø, Andersen M (iunie 2002). „Diet composition of polar bears in Svalbard and the western Barents Sea”. Polar Biology. 25 (6): 448–452 – via ResearchGate.
sciencenews.org
- „Polar bears sometimes bludgeon walruses to death with stones or ice”, Science News, , accesat în
seaworld.org
- Polar Bears: VI. Behavior., SeaWorld. Retrieved 21 January 2011.
semanticscholar.org
- Calvert, Wendy; Stirling, Ian (). „Interactions between polar bears and overwintering walruses in the Central Canadian High Arctic”. Bears: Their Biology and Management. A Selection of Papers from the Eighth International Conference on Bear Research and Management, Victoria, British Columbia, Canada, February 1989. 8: 351–356. doi:10.2307/3872939. JSTOR 3872939.
springer.com
link.springer.com
- „Longest recorded underwater dive by a polar bear - Polar Biology”, SpringerLink, accesat în
- „Recent observations of intraspecific predation and cannibalism among polar bears in the southern Beaufort Sea - Polar Biology”, SpringerLink, accesat în
thearcticsounder.com
- Ben-Yosef, Tamar (). „Alaska, Chukotka sign agreement to manage polar bears”. The Arctic Sounder. Arhivat din original la . Accesat în .
toonhound.com
- The Bear Arhivat în , la Wayback Machine., Toonhound
tvguide.com
- Abrams, Natalie (). „13 Questions with the Producers of Lost: Polar Bears, the Smoke Monster, and the Man in Black”. TV Guide. Accesat în .
twycrosszoo.org
wildpro.twycrosszoo.org
- „Polar Bear Ursus maritimus – APPEARANCE/ MORPHOLOGY: TAIL”. Wildpro. Arhivat din original la . Accesat în .
uaf.edu
- „University of Alaska Fairbanks Logo History”. Accesat în .
ualberta.ca
biology.ualberta.ca
- Derocher, Andrew E.; Magnus Andersen; Øystein Wiig (). „Sexual dimorphism of polar bears” (PDF). Journal of Mammalogy. 86 (5): 895–901. doi:10.1644/1545-1542(2005)86[895:SDOPB]2.0.CO;2 . JSTOR 4094434. Arhivat din original (PDF) la .
ucalgary.ca
journalhosting.ucalgary.ca
- „Do Wild Polar Bears (Ursus maritimus) Use Tools When Hunting Walruses (Odobenus rosmarus)?”, Journalhosting.ucalgary.ca/index.php/arctic/article/view/72532, accesat în
- „Observations of Intraspecific Aggression and Cannibalism in Polar Bears (Ursus maritimus)”, Journalhosting.ucalgary.ca/index.php/arctic/article/view/65201, accesat în
pubs.aina.ucalgary.ca
- Derocher, AE; Wiig, Ø. (). „Infanticide and Cannibalism of Juvenile Polar Bears (Ursus maritimus) in Svalbard” (PDF). Arctic. 52 (3): 307–310. CiteSeerX 10.1.1.491.140 . doi:10.14430/arctic936. Arhivat din original (PDF) la . Accesat în .
- Stirling, Ian; Lunn, N. J.; Iacozza, J. (septembrie 1999). „Long-term trends in the population ecology of polar bears in Western Hudson Bay in relation to climatic change” (PDF). Arctic. 52 (3): 294–306. doi:10.14430/arctic935. Arhivat din original (PDF) la . Accesat în .
arctic.journalhosting.ucalgary.ca
- Russell, Richard H. (). „The Food Habits of Polar Bears of James Bay and Southwest Hudson Bay in Summer and Autumn”. Arctic. 28 (2): 117–129. doi:10.14430/arctic2823.
ucsb.edu
web.chem.ucsb.edu
- Monnett, Charles; Gleason, Jeffrey S. (iulie 2006). „Observations of mortality associated with extended open-water swimming by polar bears in the Alaskan Beaufort Sea” (PDF). Polar Biology. 29 (8): 681–687. doi:10.1007/s00300-005-0105-2. Arhivat din original (PDF) la .
umich.edu
animaldiversity.ummz.umich.edu
- Gunderson, Aren (). „Ursus Maritimus”. Animal Diversity Web. University of Michigan Museum of Zoology. Arhivat din original la . Accesat în .
us.edu.pl
nicomant.fils.us.edu.pl
- „Этимологический Словарь: ДИКИЕ ЗВЕРИ” [Etymological Dictionary: Wild Animals]. Science Research Center of Linguopsychology (NICOMANT). ОШКУЙ. Arhivat din original la . Accesat în .
usgs.gov
usgs.gov
- Amstrup, Steven C.; Marcot, Bruce G.; Douglas, David C. (). Forecasting the range-wide status of polar bears at selected times in the 21st Century (PDF). Reston, Virginia: U.S. Geological Survey. Arhivat din original (PDF) la . Accesat în .
pubs.usgs.gov
- Regehr, Eric V.; Amstrup, Steven C.; Stirling, Ian (). Scris în Anchorage, Alaska. Polar bear population status in the Southern Beaufort Sea (PDF). Reston, Virginia: U.S. Geological Survey. Open-File Report 2006-1337. Accesat în .
washington.edu
faculty.washington.edu
- „Brain Facts and Figures”, Faculty.washington.edu/chudler/facts.html, accesat în
washingtonpost.com
- Harvey, Chelsea (). „Next up from climate change: More polar bears on land, potentially running into humans”. The Washington Post. Accesat în .
web.archive.org
- Ingólfsson, Ólafur; Wiig, Øystein (). „Late Pleistocene fossil find in Svalbard: the oldest remains of a polar bear (Ursus maritimus Phipps, 1744) ever discovered”. Polar Research. 28 (3). doi:10.3402/polar.v28i3.6131. ISSN 0800-0395. Arhivat din original la . Accesat în .
- Phipps, John (). A voyage towards the North Pole undertaken by His Majesty's command, 1773. London: W. Bowyer and J. Nicols, for J. Nourse. p. 185. Arhivat din original la . Accesat în .
- „Polar bear, (Ursus maritimus)” (PDF). United States Fish and Wildlife service. Arhivat din original (PDF) la . Accesat în .
Appearance. The polar bear is the largest member of the bear family, with the exception of Alaska's Kodiak bears, which equal polar bears in size.
- Gunderson, Aren (). „Ursus Maritimus”. Animal Diversity Web. University of Michigan Museum of Zoology. Arhivat din original la . Accesat în .
- Amstrup, Steven C. „Why is polar bear hunting allowed?”. Arhivat din original la . Accesat în .
- „Definition of 'white bear'”. Collins English Dictionary. Glasgow, Scotland: HarperCollins Publishers LLC. Arhivat din original la . Accesat în .
- Ben-Yosef, Tamar (). „Alaska, Chukotka sign agreement to manage polar bears”. The Arctic Sounder. Arhivat din original la . Accesat în .
- „Education: Marine Mammal Information: Polar Bears”. The Marine Mammal Center. februarie 2006. Arhivat din original la .
The Inuit name for the polar bear is nanook.
- „Этимологический Словарь: ДИКИЕ ЗВЕРИ” [Etymological Dictionary: Wild Animals]. Science Research Center of Linguopsychology (NICOMANT). ОШКУЙ. Arhivat din original la . Accesat în .
- Schliebe, Scott; Evans, Thomas; Johnson, Kurt; Roy, Michael; Miller, Susanne; Hamilton, Charles; Meehan, Rosa; Jahrsdoerfer, Sonja (). Range-wide status review of the polar bear (Ursus maritimus) (PDF). Anchorage, Alaska: United States Fish and Wildlife Service. Arhivat din original (PDF) la . Accesat în .
- Committee on Taxonomy (octombrie 2014). „List of Marine Mammal Species & Subspecies”. The Society for Marine Mammalogy. Arhivat din original la .
- Wilson, Don E. (). „Cranial variation in polar bears” (PDF). Bears: Their Biology and Management. 3: 447–453. doi:10.2307/3872793. JSTOR 3872793. Arhivat din original (PDF) la . Accesat în .
- „Agreements and Conventions”. Polar Bear Specialist Group. Arhivat din original la . Accesat în .
- Polar Bears and Conservation, arhivat din original la , accesat în
- „Polar bear FAQ”. Polar Bears International. Arhivat din original la . Accesat în .
- Campbell, Colin; Lunau, Kate (). „The war over the polar bear: Who's telling the truth about the fate of a Canadian icon?”. Maclean's. Arhivat din original la . Accesat în .
- IUCN Polar Bear Specialist Group, 2017.Summary of polar bear population status Arhivat în , la Wayback Machine..
- Purcell, Adam. „Carnivora”. Basic Biology. Arhivat din original la .
- „Polar bear, (Ursus maritimus)” (PDF). United States Fish and Wildlife service. Arhivat din original (PDF) la . Accesat în .
Appearance. The polar bear is the largest member of the bear family, with the exception of Alaska's Kodiak brown bears, a brown bear subspecies, which equal polar bears in size.
- Polar bear Ursus maritimus – Appearance/Morphology: Measurement and Weight (Literature Reports). Wildlife1.wildlifeinformation.org. Retrieved 15 September 2011.
- „Polar Bear Ursus maritimus – APPEARANCE/ MORPHOLOGY: TAIL”. Wildpro. Arhivat din original la . Accesat în .
- Engeli, Emmanuel. „Fractures of the radius and ulna secondary to possible vitamin 'D' deficiency in captive polar bears (Ursus maritimus)”. polarbearsinternational.org. Arhivat din original la .
- Derocher, Andrew E.; Magnus Andersen; Øystein Wiig (). „Sexual dimorphism of polar bears” (PDF). Journal of Mammalogy. 86 (5): 895–901. doi:10.1644/1545-1542(2005)86[895:SDOPB]2.0.CO;2 . JSTOR 4094434. Arhivat din original (PDF) la .
- „The Polar Bear — Ursus maritimus” (PDF), Polarbearsinternational.org, arhivat din original (PDF) la , accesat în
- Conflicts and Encounters Arhivat în , la Wayback Machine.. Polar Bears International. 2015.
- Why Didn't the Wild Polar Bear eat the Husky? The National Institute for Play
- „Arctic Bears”. PBS Nature. . Arhivat din original la .
- Amstrup, Steven C.; Marcot, Bruce G.; Douglas, David C. (). Forecasting the range-wide status of polar bears at selected times in the 21st Century (PDF). Reston, Virginia: U.S. Geological Survey. Arhivat din original (PDF) la . Accesat în .
- Clarkson, Peter L.; Stirling, Ian (). „Polar Bears”. În Hygnstrom, Scott E.; Timm, Robert M.; Larson, Gary E. Prevention and Control of Wildlife Damage. Lincoln: University of Nebraska. pp. C–25 to C–34. Arhivat din original (PDF) la . Accesat în .
- Derocher, AE; Wiig, Ø. (). „Infanticide and Cannibalism of Juvenile Polar Bears (Ursus maritimus) in Svalbard” (PDF). Arctic. 52 (3): 307–310. CiteSeerX 10.1.1.491.140 . doi:10.14430/arctic936. Arhivat din original (PDF) la . Accesat în .
- Wrigley, Robert E. (). „The Oldest Living Polar Bear” (PDF). Polar Bears International Newsletter. Polar Bears International. Arhivat din original (PDF) la . Accesat în .
- „Polar bears in depth: Survival”. Polar Bears International. p. 3. Arhivat din original la .
- Stirling, Ian; Lunn, N. J.; Iacozza, J. (septembrie 1999). „Long-term trends in the population ecology of polar bears in Western Hudson Bay in relation to climatic change” (PDF). Arctic. 52 (3): 294–306. doi:10.14430/arctic935. Arhivat din original (PDF) la . Accesat în .
- Monnett, Charles; Gleason, Jeffrey S. (iulie 2006). „Observations of mortality associated with extended open-water swimming by polar bears in the Alaskan Beaufort Sea” (PDF). Polar Biology. 29 (8): 681–687. doi:10.1007/s00300-005-0105-2. Arhivat din original (PDF) la .
- Stirling, Ian; Derocher, Andrew E. (). „Melting Under Pressure: The Real Scoop on Climate Warming and Polar Bears” (PDF). The Wildlife Professional. 1 (3): 24–27, 43. doi:10.4004/1933-2866(2007)1[24:MUP]2.0.CO;2. Arhivat din original (PDF) la . Accesat în .
- „Global Warming and Polar Bears”. National Wildlife Federation. Arhivat din original la . Accesat în .
- Marris, Emma (). „As Sea Ice Shrinks, Can Polar Bears Survive on Land?”. National Geographic. Arhivat din original la . Accesat în .
- „Order Authorizing the Issue of a Two Dollar Circulation Coin Commemorating the Millennium and Specifying its Characteristics, SOR/2000-245”. CanLII. . Arhivat din original la . Accesat în .
- „Our Coca-Cola Polar bears”. Coca-Cola. Arhivat din original la . Accesat în .
- The Bear Arhivat în , la Wayback Machine., Toonhound
- The Fire Within Arhivat în , la Wayback Machine., Chris d'Lacey's official website
- „The Golden Compass: The Bear Facts”. CG Society. Arhivat din original la . Accesat în .
worldcat.org
- Ingólfsson, Ólafur; Wiig, Øystein (). „Late Pleistocene fossil find in Svalbard: the oldest remains of a polar bear (Ursus maritimus Phipps, 1744) ever discovered”. Polar Research. 28 (3). doi:10.3402/polar.v28i3.6131. ISSN 0800-0395. Arhivat din original la . Accesat în .
- Wozencraft, W.C. (). „Order Carnivora”. În Wilson, D.E.; Reeder, D.M. Mammal Species of the World: A Taxonomic and Geographic Reference (ed. 3rd). Johns Hopkins University Press. p. 589. ISBN 978-0-8018-8221-0. OCLC 62265494.
- DeMaster, Douglas P.; Stirling, Ian (). „Ursus maritimus”. Mammalian Species. 145 (145): 1–7. doi:10.2307/3503828 . JSTOR 3503828. OCLC 46381503.
- Stirling, Ian; Parkinson, Claire L. (septembrie 2006). „Possible effects of climate warming on selected populations of polar bears (Ursus maritimus) in the Canadian Arctic” (PDF). Arctic. 59 (3): 261–275. doi:10.14430/arctic312. ISSN 0004-0843. Accesat în .
- Arctic Climate Impact Assessment (). Impact of a Warming Arctic: Arctic Impact Climate Assessment: Key Finding 4. Cambridge: Cambridge University Press. ISBN 978-0-521-61778-9. OCLC 56942125..
wwf.org.uk
- „Top 10 facts about polar bears”, WWF, accesat în