1. Bagirov, V.A., Ernst, L.K., Klenovitskii, P.M., and Zinov’eva, N.A., Tstologiya, 2004, vol. 46, no. 9.
2. Milovanov, V.K., Biologiya vosproizvedeniya i iskustvennoe osemenenie zhivotnykh (Biology of Reproduction and Insemination of Animals), Moscow, 1962.
3. Yushchenko, N.P., Semakov, V.G., and Levin, K.L., Molochn. Myasn. Skotovod., 1968, no. 5.
4. Kononov, V.P., Deep Freezing of Boar Semen, the Latest in Theory and Practice, Teoriya i praktika vosproizvedeniya zhivotnykh (Theory and Practice of Animal Reproduction), Moscow, 1984.
5. Milovanov, V.K., Sokolovskaya, I.I., and Kononov, V.P., Relation between Biology of Reproduction, Breeding, and Artificial Insemination of Agricultural Animals, Problemy intensifikatsii zhivotnovodstva (Problems of Intensity of Animal Husbandry), 1989.