1. Amann, H.: 1976, J. Differential Equations 21, 363.
2. Barnes, C. W. and Sturrock, P. A.: 1972, Astrophys. J. 174, 659.
3. Buneman, O.: 1969, Stanford University Institute for Plasma Research, Report No. 294.
4. Canfield, R. C., Priest, E. R., and Rust, D. M.: 1974, in Y. Nakagawa and D. M. Rust (eds.), Flare-Related Magnetic Field Dynamics, HAO-NCAR, p. 361.
5. Chandrasekhar, S.: 1961, Hydrodynamic and Hydromagnetic Stability, Oxford, Appendix III.