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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. Bibcode:1980CJFAS..37.2254L. doi:10.1139/f80-270. ISSN0706-652X.
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. Bibcode:1989CaJZ...67.1900C. doi:10.1139/z89-272. ISSN0008-4301.
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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
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. Bibcode:1990CJFAS..47.1223R. 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. Bibcode:1980CJFAS..37.2254L. doi:10.1139/f80-270. ISSN0706-652X.
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. Bibcode:1989CaJZ...67.1900C. doi:10.1139/z89-272. ISSN0008-4301.
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. Bibcode:1990CJFAS..47.1223R. 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. Bibcode:1980CJFAS..37.2254L. doi:10.1139/f80-270. ISSN0706-652X.
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. Bibcode:1989CaJZ...67.1900C. doi:10.1139/z89-272. ISSN0008-4301.