1. V.V. Akimov, V.G. Afanasev, A.S. Belousov, I.D. Blokhintsev, V.A. Volzhenskaya, L.F. Kalinkin, N.G. Leikov, V.E. Nesterov, A.M. Galper, S.A. Voronov, V.M. Zemskov, V.G. Kirillov-Ugryumov, B.I. Luchkov, Y.V. Ozerov, A.V. Popov, V.A. Rudko, M.F. Runtso, V.Y. Chesnokov, L.V. Kurnosova, M.A. Rusakovich, N.P. Topchiev, M.I. Fradkin, E.I. Chuikin, V.Y. Tugaenko, T.N. Tian, V.I. Ishkov, M. Gros, I. Grenier, E. Barouch, P. Wallin, A.R. Baser-Bachi, J.M. Lavigne, J.F. Olive, J. Juchniewicz, Sov. Astron. Lett. 18, 69 (1992)
2. D. Alexander, P.P. Dunphy, A.L. MacKinnon, Sol. Phys. 151, 147 (1994)
3. Astronomical Society of the Pacific Conference Series;M. Asplund,2005
4. C. Barat, G. Trottet, N. Vilmer, J. Dezalay, R. Talon, R. Sunyaev, O. Terekhov, A. Kuznetsov, Astrophys. J. 425, L109 (1994)
5. J.W. Bieber, J. Clem, P. Evenson, R. Pyle, D. Ruffolo, A. Sáiz, Geophys. Res. Lett. 32, 3 (2005)