1. Fishbone, L. G., and Moncrief, V. (1976).Astrophys. J.,207, 926.
2. Abramowicz, M., Jaroszyński, M., and Sikora, M. (1978).Astron. Astrophys.,63, 221.
3. Michel, F. C. (1972).Astrophys. Space Sci.,15, 153.
4. Carter, B., Gibbons, G. W., Lin, D. N. C., and Perry, M. J. (1976).Astron. Astrophys.,52, 427.
5. Taub, A. H. (1978).Ann. Rev. Fiuid Mech.,10, 301.