1. I. Spalding,Advances in Plasma Physics, edited by A. Simon and W. B. Thompson (Wiley, New York, 1971), Vol. 4, p. 79.
2. Plasma containment in cusp-shaped magnetic fields
3. Plasma potential in electrostatically plugged cusps and mirrors
4. T. K. Allen, A. J. Cox, and I. J. Spalding, inProceedings of Seventh International Conference on Phenomena in Ionized Gases, edited by B. Perovic and D. Tosic (Gradevinska Knjiga, Beograd, Yugoslavia, 1966), Vol. 2, p. 171.
5. Plasma confinement by localized cusps