1. Oil spills in the Arctic Ocean: Extent of spreading and possibility of large-scale thermal effects;Ayers;Science,1974
2. Mother-young relations and the maturation of pup behaviour in the Alaska fur seal;Bartholomew;Anim. Behav.,1959
3. California sea lion in the Yaquina River Estuary, Oregon;Bayer;Murrelet,1981
4. Beloborodov, A. G., and Potelev, V. A. (1966). First period of life of the hooded seal in the Greenland Sea. In “Proceedings of the Third All-Union Conference Marine Mammals,” pp. 7–8. Izd. “Nauka,” Vladivostok (in Russian).
5. Pathology of Baltic gray seal and ringed seal females with special reference to adrenocortical hyperplasia: Is environmental pollution the cause of a widely distributed disease syndrome?;Bergman;Finn. Game Res.,1986