1. Marshall, J., Phys. Fluids, 3, 134 (1960).
2. Gott, Y. B., Ioffe, M. S., and Telkovsky, V. G., Proc. Conf. Plasma Physics and Controlled Fusion, Salzburg, 3, 1045 (1961).
3. Artsimovich, L. A., Controlled Thermonuclear Reactions (Moscow, 1961).
4. Taylor, J. B., Phys. Fluids, 6, 1529 (1963).