1. I. A. Arshavskii, Outlines of Age Physiology [in Russian], Moscow (1969).
2. O. T. Vakhidova, Byull. Éksperim. Biol. i Med., No. 2, 32 (1964).
3. A. B. Elantsev, Byull. Éksperim. Biol. i Med., No. 10, 97 (1966).
4. S. I. Enikeeva, Fiziol. Zh. SSSR,25, No. 1–2, 102 (1938).
5. I. E. Mozgov, The Pharmacology of Stimulators in Livestock Breeding [in Russian], Moscow (1964).