1. Kapitza, P. L., Doklady, U.S.S.R. (1955).
2. Cushing, V., and Sodha, M. S., “Confinement of Plasma by Standing E–M Waves”, “Physics of Fluids” (to be published).
3. McLachlin, N. W., “Theory and Applications of Mathieu Functions” (Oxf. Univ. Press, New York, 1947).