Natalia Rybczynski; Mary R. Dawson; Richard H. Tedford (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
Natalia Rybczynski; Mary R. Dawson; Richard H. Tedford (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
Natalia Rybczynski; Mary R. Dawson; Richard H. Tedford (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.