1. B. D. Brondz, Byull. Éksperim. Biol. i Med., No. 5, 64 (1964).
2. L. A. Zil'ber, T. I. Biryulina, V. Ya. Shevlyagin, et al., Folia Biol. (Prague),13, 245 (1967).
3. I. N. Kryukova, Acta Virol.,10, 440 (1966).
4. N. N. Kuznetsova, V. Ya. Shevlyagin, and T. I. Biryulina, Vopr. Virusol., No. 1, 47 (1960).
5. B. F. Semenov, in: Textbook of Laboratory Diagnosis of Virus and Rickettsial Diseases [in Russian], Moscow (1965), p. 209.