1. Erokhina, I.A., Kavtsevich, N.N., and Minzyuk, T.V., Hematological and biochemical parameters of the gray seal Halichoerus grypus (Phocidae) in the Kandalaksha state nature reserve (Russia), Nat. Conserv. Res.,
Zapoved. Nauka, 2020, vol. 5, no. 1, p. 31. https://doi.org/10.24189/ncr.2020.003
2. Goertz, C.E.C., Reichmuth, C., Thometz, N.M., et al., Comparative health assessments of Alaskan ice seals, Front. Vet. Sci., 2019, vol. 6, no. 4, p. 1. https://doi.org/10.3389/fvets.2019.00004
3. Gulland, F.M.D., Dierauf, L.A., and Whitman, K.L., Appendix 1: Normal hematology and serum chemistry ranges, in CRC Handbook of Marine Mammal Medicine, New York: CRC, 2018. https://doi.org/10.1111/mms.12698
4. Il’ina, P.O., Shibanova, P.Yu., Glazov, D.M., et al., Visual census of the number of Baikal seals (Pusa sibirica) on the summer coastal rookeries of Tonkiy Island of the Ushkany Islands archipelago, Materialy konferentsii s mezhdunarodnym uchastiem “Mlekopitayushchie v menyayushchemsya mire: aktual’nye problemy teriologii” (Proc. Conf. Int. Participation “Mammals in a Changing World: Current Problems of Theriology”), Moscow: KMK, 2022.
5. Ivanov, T.M., On the food of the Baikal seal (Phoca sibirica Gmelin) and methods for its study, Izv. Biol.-Geogr. Nauchno-Issled. Inst. Prirody Vost.-Sib.
Univ., 1936, vol. 7, nos. 1–2, p. 137.