1. Gavrilov, L.A. and Gavrilova, N.S., Biologiya prodolzhitel’nost’ zhizni (Biology of Life Span), Moscow: Nauka, 1991.
2. Krut’ko, V.N., Slavin, M.B., and Smirnova, T.M., Matematicheskie osnovaniya gerontologii. Seriya “Problemy gerontologii” (Mathematical Principles of Gerontology. Series “Problems of Gerontology”), Krut’ko, V.N., Eds., Moscow: URSS, 2002, no. 4.
3. Cherepanov, G.G. and Reshetov, V.B., Analysis of age dynamics of milk production of cows related with duration of their use, Probl. Biol. Prod. Zhivotn., 2010, no. 1, pp. 5–17.
4. Cherepanov, G.G. and Reshetov, V.B., Investigation of the age dependent dynamics of milk productivity and culling intensity in dairy cows in relation to their longevity, Probl. Biol. Prod. Zhivotn., 2011, no. 3, pp. 26–37.
5. Cherepanov, G.G. and Bogdanova, N.A., On analysis of the age dynamics of milk yields and culling of dairy cows: construction of a method and its verification, Probl. Biol. Prod. Zhivotn., 2012, no. 1, pp. 110–119.