1. V. P. Baluda and I. B. Tsynkalovskii, In: Proceedings of the 14th Conference of Physiologists of the South of the RSFSR [in Russian], Krasnodar (1962), p. 25.
2. K. Bobek and V. Cepelak, Chekhoslovatskoe med. obozr.,4, 1 (1957).
3. K. Bobek and V. Cepelak, Klin. med.,6, 93 (1959).
4. D. M. Zubairov and G. I. Deryagina, Tsitologiya,4, 465 (1962).
5. E. F. Izmailova and M. A. Kotovshchikova, Labor. delo,4, 13 (1962).