Kovacs, K.M. 2015. Pagophilus groenlandicus. The IUCN Red List of Threatened Species 2015: e.T41671A45231087. „Pagophilus groenlandicus: Kovacs, K.M.”. 2015. doi:10.2305/IUCN.UK.2015-4.RLTS.T41671A45231087.en.. Downloaded on 03 April 2018.
Folkow, L.P.; Nordøy, E.S. (2004). „Distribution and diving behaviour of harp seals (Pagophilus groenlandicus) from the Greenland Sea stock”. Polar Biology. 27 (5): 281—298. S2CID27841378. doi:10.1007/s00300-004-0591-7.
Lydersen, Christian; Kovacs, Kit M. (1993). „Diving behaviour of lactating harp seal, Phoca groenlandica, females from the Gulf of St Lawrence, Canada”. Animal Behaviour. 46 (6): 1213—1221. S2CID53203432. doi:10.1006/anbe.1993.1312.
Lindstrøm, Ulf; Nilssen, Kjell (2013). „Harp seal foraging behaviour during summer around Svalbard in the northern Barents Sea: diet composition and the selection of prey”. Polar Biology. 36 (3): 305—320. S2CID253815036. doi:10.1007/s00300-012-1260-x.
Lindstrøm, U.; Harbitz, A.; Haug, T.; Nilssen, K. T. (1998). „Do harp seals Phoca groenlandica exhibit particular prey preferences?”. ICES Journal of Marine Science. 55 (5): 941—953. doi:10.1006/jmsc.1998.0367.
John, Lawson; Anderson, John (1998). „Selective foraging by harp seals Phoca groenlandica in nearshore and offshore waters of Newfoundland, 1993 and 1994”. Marine Ecology Progress Series. 163: 1—10. doi:10.3354/meps163001.
Miller, Edward H.; Burton, Lauren E. (2001). „It's all relative: allometry and variation in the baculum (os penis) of the harp seal, Pagophilus groenlandicus (Carnivora: Phocidae)”. Biological Journal of the Linnean Society. 72 (3): 345—355. doi:10.1111/j.1095-8312.2001.tb01322.x.
Berta, Annalisa; Churchill, Morgan (1. 7. 2012). „Pinniped taxonomy: review of currently recognized species and subspecies, and evidence used for their description”. Mammal Review (на језику: енглески). 42 (3): 207—234. ISSN1365-2907. doi:10.1111/j.1365-2907.2011.00193.x.
Sergeant, D.E. (1973). „Transatlantic migration of a Harp Seal, Pagophilus groenlandicus”. Journal of the Fisheries Research Board of Canada. 30: 124—125. doi:10.1139/f73-020.
Sergeant, D.E. (1. 9. 1976). „History and present status of populations of harp and hooded seals”. Biological Conservation (на језику: енглески). 10 (2): 95—118. ISSN0006-3207. doi:10.1016/0006-3207(76)90055-0.
Haug, T.; Krøyer, A. B.; Nilssen, K. T.; Ugland, K. I.; Aspholm, P. E. (1991). „Harp seal (Phoca groenlandica) invasions in Norwegian coastal waters: age composition and feeding habits”. ICES Journal of Marine Science (на језику: енглески). 48 (3): 363—371. ISSN1054-3139. doi:10.1093/icesjms/48.3.363.
Huag, Tore; Nilssen, Kjell Tormod (1995). „Ecological implications of harp seal Phoca groenlandica invasions in northern Norway”. Developments in Marine Biology (на језику: енглески). 4: 545—556. ISBN9780444820709. ISSN0163-6995. doi:10.1016/S0163-6995(06)80053-3.
„Harp Seal”. Oceana (на језику: енглески). Приступљено 10. 4. 2018.
semanticscholar.org
api.semanticscholar.org
Folkow, L.P.; Nordøy, E.S. (2004). „Distribution and diving behaviour of harp seals (Pagophilus groenlandicus) from the Greenland Sea stock”. Polar Biology. 27 (5): 281—298. S2CID27841378. doi:10.1007/s00300-004-0591-7.
Lydersen, Christian; Kovacs, Kit M. (1993). „Diving behaviour of lactating harp seal, Phoca groenlandica, females from the Gulf of St Lawrence, Canada”. Animal Behaviour. 46 (6): 1213—1221. S2CID53203432. doi:10.1006/anbe.1993.1312.
Lindstrøm, Ulf; Nilssen, Kjell (2013). „Harp seal foraging behaviour during summer around Svalbard in the northern Barents Sea: diet composition and the selection of prey”. Polar Biology. 36 (3): 305—320. S2CID253815036. doi:10.1007/s00300-012-1260-x.
Encyclopedia of marine mammals. Perrin, William F., Würsig, Bernd G., Thewissen, J. G. M. (2nd изд.). Amsterdam: Elsevier/Academic Press. 2009. ISBN9780123735539. OCLC316226747.
Berta, Annalisa; Churchill, Morgan (1. 7. 2012). „Pinniped taxonomy: review of currently recognized species and subspecies, and evidence used for their description”. Mammal Review (на језику: енглески). 42 (3): 207—234. ISSN1365-2907. doi:10.1111/j.1365-2907.2011.00193.x.
Sergeant, D.E. (1. 9. 1976). „History and present status of populations of harp and hooded seals”. Biological Conservation (на језику: енглески). 10 (2): 95—118. ISSN0006-3207. doi:10.1016/0006-3207(76)90055-0.
Haug, T.; Krøyer, A. B.; Nilssen, K. T.; Ugland, K. I.; Aspholm, P. E. (1991). „Harp seal (Phoca groenlandica) invasions in Norwegian coastal waters: age composition and feeding habits”. ICES Journal of Marine Science (на језику: енглески). 48 (3): 363—371. ISSN1054-3139. doi:10.1093/icesjms/48.3.363.
Huag, Tore; Nilssen, Kjell Tormod (1995). „Ecological implications of harp seal Phoca groenlandica invasions in northern Norway”. Developments in Marine Biology (на језику: енглески). 4: 545—556. ISBN9780444820709. ISSN0163-6995. doi:10.1016/S0163-6995(06)80053-3.