1. Backmann G (1931) Das Wachstumsproblem. Ergebnisse der Physiologie, bd
2. Bailey N (1970) Mathematics in biology and medicine. Moscow: Mir:326
3. Baer KM (1950). The history of the development of animals. Observations and thoughts. Moscow: publishing house of USSR Academy of Sciences, series «classics of science», v. 1
4. Series «classics of science»;KM Baer,1952
5. Berzin AA (1971) Sperm whale. Publ “Food Industry”, Moscow, p 368