1. R. L. Hickock and F. C. Jobes, Bull. Am. Phys. Soc.16, 1231 (1971).
2. A. N. Dellis and J. C. Hosea, Princeton Report MATT 969 (1973).
3. S. Von Gueler, W. Stodiek, and N. Sauthoff, Phys. Rev. Lett.33, 1201 (1974).
4. R. Cano, I. Fidone, and J. C. Hosea, Phys. Fluids18, 1183 (1975).
5. TFR Group, Proc. 7th Euro. Conf. in Controlled Fusion and Plasma Physics1, 11, Lausanne (1975).