1. E. K. Ginter and B. V. Konyukhov, Byul. Éksperim. Biol. i Med., No. 6, 98 (1966).
2. B. V. Konyukhov and E. K. Ginter, Folia Biol., (Praha),12, 199 (1966).
3. B. V. Konyukhov and N. A. Malinina, Byul. Éxperim. Biol. i Med., No. 11, 125 (1967).
4. N. A. Malinina, Proceedings of a Conference of Junior Scientific Workers of the Institute of Experimental Biology [in Russian], Moscow (1967), p. 74.
5. H. H. F. Barnes and G. I. M. Sawyer, Brit. Med. J.,2, 914 (1952).