Berta A.; Churchill M.; Boessenecker R. W. (2018). "The Origin and Evolutionary Biology of Pinnipeds: Seals, Sea Lions, and Walruses". Annual Review of Earth and Planetary Sciences. 46: 203—228. Bibcode:2018AREPS..46..203B. doi:10.1146/annurev-earth-082517-010009.
Rybczynski N.; Dawson M. R.; Tedford R. H. (2009). "A semi-aquatic Arctic mammalian carnivore from the Miocene epoch and origin of Pinnipedia". Nature. 458 (7241): 1021—1024. Bibcode:2009Natur.458.1021R. doi:10.1038/nature07985. PMID19396145.
harvard.edu
ui.adsabs.harvard.edu
Berta A.; Churchill M.; Boessenecker R. W. (2018). "The Origin and Evolutionary Biology of Pinnipeds: Seals, Sea Lions, and Walruses". Annual Review of Earth and Planetary Sciences. 46: 203—228. Bibcode:2018AREPS..46..203B. doi:10.1146/annurev-earth-082517-010009.
Rybczynski N.; Dawson M. R.; Tedford R. H. (2009). "A semi-aquatic Arctic mammalian carnivore from the Miocene epoch and origin of Pinnipedia". Nature. 458 (7241): 1021—1024. Bibcode:2009Natur.458.1021R. doi:10.1038/nature07985. PMID19396145.
nih.gov
pubmed.ncbi.nlm.nih.gov
Rybczynski N.; Dawson M. R.; Tedford R. H. (2009). "A semi-aquatic Arctic mammalian carnivore from the Miocene epoch and origin of Pinnipedia". Nature. 458 (7241): 1021—1024. Bibcode:2009Natur.458.1021R. doi:10.1038/nature07985. PMID19396145.