1. J. Berkowitz, K. O. Friedrichs, H. Goertzel, H. Grad, T. Killeen, and E. Rubin, inProceedings of the Second United Nations International Conference on the Peaceful Uses of Atomic Energy(United Nations, Geneva, 1958), Vol. 31, p. 171.
2. H. Grad, New York University Report NYO-9496 (1961, unpublished).
3. J. G. Linhart,Plasma Physics(North-Holland Publishing Company, Amsterdam, 1960), Chap. 2.
4. Plasma Jet Piercing of Magnetic Fields and Entropy Trapping into a Conservative System