1. E. V. Gubar' and A. P. Pekhov, Byull. �ksp. Biol. Med., No. 8, 223 (1985).
2. A. P. Pekhov and V. N. Reshetnikova, in: Abstracts of Proceedings of the 6th Working Conference on the ?Plasmid? Program [in Russian], Moscow (1981), pp. 120?121.
3. M. Couturier, F. Bex, P. Bergqvist, and W. Maas, Microbiol. Rev.,52, No. 3, 375 (1988).
4. D. L. Daniels, J. R. De Wet, and F. R. Blatner, J. Virol.,33, 390 (1980).
5. N. Datta, in: R-Factor, Drug Resistance Plasmid, Baltimore (1977), pp. 225?272.