1. A. Ya. Kul'berg, E. E. Babaeva, and A. A. Rodnikova,Immunologiya, No. 4, 12–14 (1994).
2. A. Ya. Kul'berg, Yu. B. Berkun, and S. B. Cheknev, ——Ibid.,, No. 6, 7–9 (1997).
3. M. P. Rykova, I. V. Spirande, M. S. Zedgenidze,et al., ——Ibid.,, No. 3, 88–90 (1981).
4. S. B. Cheknev,Byull. Eksp. Biol. Med.,127, No. 6, 668–671 (1999).
5. S. B. Cheknev, D. V. Kuyavskaya, I. A. Tarkhanova,et al., ——Ibid.,,118, No. 7, 54–59 (1994).