1. V. L. Ginzburg, Propagation of Electromagnetic Waves in Plasma [in Russian], izd. Nauka, Moscow, 1967.
2. V. N. Tsytovich, Nonlinear Effects in Plasma [in Russian], izd. Nauka, Moscow, 1967.
3. N. M. Kroll, A. Ron, and N. Rostoker, Phys. Rev. Letters,13, 83, 1964.
4. H. Cheng and Y. C. Lee, Phys. Rev.,156, 172, 1967.
5. A. A. Ivanov and D. D. Ryutov, ZhETF,48, 684, 1965.