Schusterman, R. J.; Kastak, D.; Levenson, D. H.; Reichmuth, C. J.; Southall, B. L. (2000). "Why pinnipeds don't echolocate". The Journal of the Acoustical Society of America. 107 (4): 2256–64. Bibcode:2000ASAJ..107.2256S. doi:10.1121/1.428506. PMID10790051.
Roffe, B. R.; Mate (1984). "Abundances and feeding habits of Pinnipeds in the Rogue River, Oregon". The Journal of Wildlife Management. 48 (4): 1262–1274. doi:10.2307/3801787. JSTOR3801787.
Schusterman, R. J.; Kastak, D.; Levenson, D. H.; Reichmuth, C. J.; Southall, B. L. (2000). "Why pinnipeds don't echolocate". The Journal of the Acoustical Society of America. 107 (4): 2256–64. Bibcode:2000ASAJ..107.2256S. doi:10.1121/1.428506. PMID10790051.
jstor.org
Roffe, B. R.; Mate (1984). "Abundances and feeding habits of Pinnipeds in the Rogue River, Oregon". The Journal of Wildlife Management. 48 (4): 1262–1274. doi:10.2307/3801787. JSTOR3801787.
nih.gov
pubmed.ncbi.nlm.nih.gov
Schusterman, R. J.; Kastak, D.; Levenson, D. H.; Reichmuth, C. J.; Southall, B. L. (2000). "Why pinnipeds don't echolocate". The Journal of the Acoustical Society of America. 107 (4): 2256–64. Bibcode:2000ASAJ..107.2256S. doi:10.1121/1.428506. PMID10790051.