1. G. A. Gurzadyan, Flare Stars [in Russian], Nauka, Moscow (1973).
2. G. A. Gurzadyan, Astrophys. Space Sci.,48, 313;52, 51 (1977).
3. I. M. Gordon, Dokl. Akad. Nauk SSSR,97, 621 (1954).
4. B. V. Somov and S. I. Syrovatskii, Usp. Fiz. Nauk,120, 217 (1976).
5. S. A. Kaplan, S. B. Pikel'ner, and V. N. Tsytovich, Physics of the Plasma of the Solar Atmosphere [in Russian], Nauka, Moscow (1977).