1. N. E. Vvedenskii, Complete Collected Works [in Russian], Vol. 2, Leningrad (1951), p. 102.
2. E. K. Zhukov, Trudy Fiziol. Inst. im. I. P. Pavlova,18, 27 (1937).
3. L. N. Zefirov and G. I. Poletaev, in: Proceedings of the Third Volga Conference of Physiologists, Biochemists, and Pharmacologists [in Russian], Gor'kii (1963), p. 69.
4. L. L. Katalymov, Fiziol. Zh. SSSR, No. 1, 26 (1970).
5. L. L. Katalymov, Byull. Éksperim. Biol. i Med., No. 5, 10 (1971).