1. A. Hewish, Ann. Rev. Ast. Astrophys,8, 265, 1970.
2. O. P. Prylutsky andL. L. Rosental, 12. Int. Conf. on Cosmic Rays., Conf. Papers, 2, Tasmania, CT p. 180 1971.
3. T. Erber, Rev. Mod. Phys.,38, 626, 1966.
4. V. N. Payer et al., J. Physica,14, 1020, 1971.
5. N. B. Narozhny andN. I. Nikishov, JETP,36, 1136, 1972.