| A semi-aquatic Arctic mammalian carnivore from the Miocene epoch and origin of Pinnipedia |  |
| Rybczynski, N.; Dawson, M.R.; Tedford, R.H. (2009). A semi-aquatic Arctic mammalian carnivore from the Miocene epoch and origin of Pinnipedia Nature (Lond.) 458(7241): 1021-1024 |
| In: Nature: International Weekly Journal of Science. Nature Publishing Group: London. ISSN 0028-0836, meer |
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