1. Plasma Stability and Boundary Condition
2. D. Bohm, inThe Characteristics of Electrical Discharges in Magnetic Fields, edited by A. Guthrie and R. K. Wakerling (McGraw-Hill Book Company, Inc., New York, 1949), Chap. III.
3. T. K. Allen, G. A. Paulikas, and R. V. Pyle, Phys. Rev. Letters (to be published).
4. A General Theory of the Plasma of an Arc
5. Reference 2, p. 40.