1. Baum, P. J. and Bratenahl, A.: 1980,Solar Phys. 58, 89.
2. Birn, J., Hones, E. W., Jr., and Schindler, K.: 1987.J. Geophys. Res. 91, 116.
3. Biskamp, D.: 1986,Phys. Fluids 29, 1520.
4. Brushlinsky, K. V., Zaborov, M. A., and Syrovatskii, S.I.: 1980,Fiz. Plasmy USSR 6, 297.
5. Cox, D. P. and Tucker, W. H.: 1969,Astrophys. J. 157, 1157.