1. H. Maecker, inAn Introduction to Discharge and Plasma Physics, S. C. Haydon, ed., The University of New England, Armidal, N.S.W., Australia (1964), pp. 245?303.
2. N. Sanders, K. Etemadi, K. C. Hsu, and E. Wender.J. Appl. Phys. 53, 4136 (1982).
3. K. U. Maske, Report No. M178, Mintek, Randburg, SA (1985).
4. M. F. Lerrol, B. Pateyron, G. Delluc, and P. Fauchais,Rev. Int. Hautes Temp. Refract. 24, 93 (1987?1988).
5. J. F. Lancaster,IEEE Prod. 134, Pt. B, (5), 233 (1987).