1. G. I. Freidman, ZhETF, 41, 226, 1961.
2. R. Becker, Theory of Electricity [Russian translation], GITTL, Moscow-Leningrad, 1941.
3. Ba. B. Fainberg and V. S. Tkalich, ZhTF, 29, 491, 1959.
4. V. I. Silin and A. A. Rukhadze, Electromagnetic Properties of Plasmas and Plasma-Like Media [in Russian], Gosatomizdat, 1961.
5. V. L. Ginzburg, Propagation of Electromagnetic Waves in a Plasma [in Russian], Fizmatgiz, 1960.