1. V. Ya. Arion, Immunology [in Russian], Vol. 10, Moscow (1982), p. 45.
2. Yu. I. Zimin, S. V. Chukanov, and B. S. Kaganov, Immunologiya, No. 3, 76 (1983).
3. A. V. Karaulov, V. P. Sil'vestrov, Yu. I. Khromenkov, et al., Immunologiya, No. 4, 29 (1984).
4. O. V. Chakhava, E. M. Gorskaya, and S. Z. Ruban, Microbiological and Immunological Bases of Gnotobiology [in Russian], Moscow (1982).
5. A. G. Chuchalin, V. Ya. Arion, V. S. Babushkina, et al., Ter. Arkh., No. 10, 10 (1984).