1. A review of the taxonomy of the Kuril seal and other members of the genus Phoca (sensu stricto);Niizuma,1986
2. Macrogeographic structure and patterns of genetic diversty in harbor seals (Phoca vitulina) from Alaska to Japan;Westlake;J. Mammal.,2002
3. D. Thompson, T. Härkönen, Phoca vitulina (e.T17013A6723560.), IUCN SSC Pinniped Specialist Group, The IUCN Red List of Threatened Species, 2008. (doi: https://doi.org/10.2305/IUCN.UK.2008.RLTS.T17013A6723560.) (accessed 23 November 2015).
4. A migration model based on sex and age composition of Kuril seals captures along the coast of Nemuro Peninsula, Hokkaido;Hayama,1986
5. Socio-ecology and reproductive strategy of the Kuril seal;Niizuma,1986