1. Appert, K., Gruber, R., and Vaclavik, J.: 1974, Phys. Fluids 17, 1471.
2. Braun, D. C., Duvall, T. L., Jr., and LaBonte, B. J.: 1988, Astrophys. J. 335, 1015.
3. Chen, L. and Hasegawa, A.: 1974, Phys. Fluids 17, 1399.
4. Goedbloed, J. P.: 1983, Lecture Notes on Ideal Magnetohydrodynamics, Rijnhuizen Report 83-145, Association Euratom, p. 116.
5. Goossens, M.: 1991, in E. R. Priest (ed.), Advances in Solar System MHD, Cambridge University Press, Cambridge (in press).