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Risch, Denise; Clark, Christopher W.; Corkeron, Peter J.; Elepfandt, Andreas; Kovacs, Kit M.; Lydersen, Christian; Stirling, Ian; Van Parijs, Sofie M. (May 2007). "Vocalizations of male bearded seals, Erignathus barbatus: classification and geographical variation". Animal Behaviour. 73 (5): 747–762. doi:10.1016/j.anbehav.2006.06.012. ISSN0003-3472. S2CID53187110.
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Saundry, Peter. 2010. Bearded sealArchived July 4, 2010, at the Wayback Machine. Encyclopedia of Earth. Topic editor C. Michael Hogan, Ed.in Chief: Cutler Cleveland, NCSE, Washington DC
Hjelset, A. M.; Andersen, M.; Gjertz, I.; Lydersen, C.; Gulliksen, B. (1999-02-23). "Feeding habits of bearded seals ( Erignathus barbatus ) from the Svalbard area, Norway". Polar Biology. 21 (3): 186–193. doi:10.1007/s003000050351. ISSN0722-4060. S2CID25532134.
Saundry, Peter. 2010. Bearded sealArchived July 4, 2010, at the Wayback Machine. Encyclopedia of Earth. Topic editor C. Michael Hogan, Ed.in Chief: Cutler Cleveland, NCSE, Washington DC
Ryg, Morten; Lydersen, Christian; Markussen, Nina H.; Smith, Thomas G.; Øritsland, Nils Are (18 January 1990). "Estimating the Blubber Content of Phocid Seals". Canadian Journal of Fisheries and Aquatic Sciences. 47 (6): 1223–1227. doi:10.1139/f90-142. ISSN0706-652X.
Lowry, Lloyd F.; Frost, Kathryn J.; Burns, John J. (1980). "Variability in the Diet of Ringed Seals, Phoca hispida, in Alaska". Canadian Journal of Fisheries and Aquatic Sciences. 37 (12): 2254–2261. doi:10.1139/f80-270. ISSN0706-652X.
Hjelset, A. M.; Andersen, M.; Gjertz, I.; Lydersen, C.; Gulliksen, B. (1999-02-23). "Feeding habits of bearded seals ( Erignathus barbatus ) from the Svalbard area, Norway". Polar Biology. 21 (3): 186–193. doi:10.1007/s003000050351. ISSN0722-4060. S2CID25532134.
Risch, Denise; Clark, Christopher W.; Corkeron, Peter J.; Elepfandt, Andreas; Kovacs, Kit M.; Lydersen, Christian; Stirling, Ian; Van Parijs, Sofie M. (May 2007). "Vocalizations of male bearded seals, Erignathus barbatus: classification and geographical variation". Animal Behaviour. 73 (5): 747–762. doi:10.1016/j.anbehav.2006.06.012. ISSN0003-3472. S2CID53187110.
Cleator, Holly J.; Stirling, Ian; Smith, T. G. (5 July 1989). "Underwater vocalizations of the bearded seal (Erignathus barbatus)". Canadian Journal of Zoology. 67 (8): 1900–1910. doi:10.1139/z89-272. ISSN0008-4301.