1. Aiyy Uola Aian, Ecology of the Brown Bear in Yakutia, Extended Abstract of Cand. Sci. (Biol.) Dissertation, Petrozavodsk, 2004.
2. Chernyavskii, F.B., Mlekopitayushchie krainego Severo-Vostoka Sibiri (Mammals of the Extreme Northeast of Siberia), Moscow: Nauka, 1984.
3. Danilov, P.I., Rusakov, O.S., and Tumanov, I.L., Khishchnye zveri Severo-Zapada SSSR (Predatory Mammals of the Northwestern Soviet Union), Moscow: Nauka, 1979.
4. Egorov, O.V., Ekologiya i promysel yakutskoi belki (Yakutian Squirrel: Ecology and Commercial Hunting), Moscow: Akad. Nauk SSSR, 1961.
5. Gubar’, Yu.P., Metodicheskie ukazaniya po opredeleniyu chislennosti burogo medvedya (Methodological Guidelines for Estimating the Numbers of Brown Bears), Moscow, 1990.