Berta, A.; Churchill, M. (2012). "Pinniped taxonomy: Review of currently recognized species and subspecies, and evidence used for their description". Mammal Review. 42 (3). ss. 207-34. doi:10.1111/j.1365-2907.2011.00193.x.KB1 bakım: Birden fazla ad: yazar listesi (link)
Berta, A.; Ray, C. E.; Wyss, A. R. (1989). "Skeleton of the oldest known pinniped, Enaliarctos mealsi". Science. 244 (4900). ss. 60-62. doi:10.1126/science.244.4900.60. JSTOR1703439. PMID17818847.KB1 bakım: Birden fazla ad: yazar listesi (link)
Arnason, U.; Gullberg, A.; Janke, A.; Kullberg, M. (2007). "Mitogenomic analyses of caniform relationships". Molecular Phylogenetics and Evolution. 45 (3). ss. 863-74. doi:10.1016/j.ympev.2007.06.019. PMID17919938.KB1 bakım: Birden fazla ad: yazar listesi (link)
jstor.org
Berta, A.; Ray, C. E.; Wyss, A. R. (1989). "Skeleton of the oldest known pinniped, Enaliarctos mealsi". Science. 244 (4900). ss. 60-62. doi:10.1126/science.244.4900.60. JSTOR1703439. PMID17818847.KB1 bakım: Birden fazla ad: yazar listesi (link)
nih.gov
ncbi.nlm.nih.gov
Berta, A.; Ray, C. E.; Wyss, A. R. (1989). "Skeleton of the oldest known pinniped, Enaliarctos mealsi". Science. 244 (4900). ss. 60-62. doi:10.1126/science.244.4900.60. JSTOR1703439. PMID17818847.KB1 bakım: Birden fazla ad: yazar listesi (link)
Arnason, U.; Gullberg, A.; Janke, A.; Kullberg, M. (2007). "Mitogenomic analyses of caniform relationships". Molecular Phylogenetics and Evolution. 45 (3). ss. 863-74. doi:10.1016/j.ympev.2007.06.019. PMID17919938.KB1 bakım: Birden fazla ad: yazar listesi (link)