1. Belovsky, M. N., Kurt, V. G., and Ochelkov, Yu. P.: 1979,Kosmicheskije Issledovaniya 17, 906 (in Russian).
2. Belyakov, S. A., Daibog, E. I., Dyachkov, A. P., Zenchenko, V. M.et al. (12 authors): 1984,Kosmicheskije Issledovaniya 22, 906 (in Russian).
3. Beresinskii, V. S., Bulanov, S. V., Dogiel, V. A., Ginzburg, V. L., and Ptuskin, V. S.: 1990,Astrophysics of Cosmic Rays, North-Holland, Amsterdam, p. 534.
4. Bulanov, S. V., Kurnosova, L. V., Ogulchansky, Ya. Yu., Razorenov, L. A., and Fradkin, M. I.: 1985,Pisma v Astron. Zh. 11, 383 (in Russian).
5. Cliver, E., Reames, D., Kahler, S., and Cane, H.: 1991,Proc. 22nd Int. Cosmic Ray Conf. 3, 25.