1. B. Lehnert, inProceedings of the Second United Nations Conference on the Peaceful Uses of Atomic Energy(United Nations, Geneva, 1958), Vol. 32, p. 349.
2. Diffusion Processes in a Plasma Column in a Longitudinal Magnetic Field
3. Instability of a Positive Column in a Magnetic Field
4. G. A. Paulikas, University of California Radiation Laboratory Rept. UCRL-9588 (1961, unpublished).