1. See C. F. Kennel, in From Particles to Plasmas, Lectures Honoring Marshall N. Rosenbluth, ed. by J. W Van Dam, pp. 203–226, Addison-Wesley, New York, 1989, for a discussion on roles of Alfvdn waves in astrophysical plasmas.
2. A. Barnes, Cosmic Electrodyn. 1, 90 (1970)
3. D. Winske and M. Leroy, J. Geophys. Res. 89, 2673 (1984)
4. D. Sentman et al., J. Geophys. Res. 86, 7487 (1981).
5. L. F. Burlaga, Rev. Geophys. 21, 363 (1983).