1. G. V. Abramyan, V. A. Lipovetskii, and Dzh. A. Stepanyan,Astrofizika,32, 29 (1990).
2. G. V. Abramyan, V. A. Lipovetskii, A. M. Mikaelyan, and Dzh. A. Stepanyan,Astrofizika,33, 213, 345 (1990);34, 13 (1991).
3. G. V. Abramyan and A. M. Mikaelyan,Astrofizika,36, 109 (1993), in press;36 (1993), in press;37 (1994), in press;37 (1994), in press.
4. G. V. Abramyan and A. M. Mikaelyan,Astrofizika,35, 197 (1991).
5. A. M. Mikaelyan, M. A. Eritsyan, and G. V. AbramyanAstrofizika,34, 351 (1991).