Urs polar (Romanian Wikipedia)
Analysis of information sources in references of the Wikipedia article "Urs polar" in Romanian language version.
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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. 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. 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, 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. 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 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
- 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