1. J. A. Roberts,Austral. J. Phys.,12, 322 (1959).
2. I. N. Cairns and R. D. Robinson,Solar Phys.,111, 365 (1987).
3. G. Mann and S. Klose, in: AGU 1995 Fall Meeting, Suppl. EOJ7, F455 (1995).
4. S. A. Kaplan and V. N. Tsytovich,Plasma Astrophysics [in Russian], Nauka, Moscow (1972).
5. V. V. Zaitsev and A. V. Stepanov,Izv. Vyssh. Uchebn. Zaved., Radiofiz.,17, 1229 (1974).