1. R. A. Burkharov, Yu. M. Zaretskaya, G. M. L'vitsyna,et al., Immunologiya, No. 6, 84–86 (1984).
2. A. V. Karaulov, V. A. Dushkin, M. M. Intizarov,et al., in:Theoretical and Practical Problems of Gnotobiology [in Russian]. Moscow (1986), pp. 101–104.
3. S. A. Ketlinskii and N. M. Kalinina.Immunologiya, No. 3, 30–44 (1995).
4. I. V. Kondratenko, A. A. Yarilin, and L. N. Khakhalin.Ibid.,, No. 1, 6–10 (1992).
5. V. A. KuznetsovIbid., No. 3, 8–13 (1992).