1. R. Z. Sagdeev and A. A. Galeev, Nonlinear Plasma Theory, Ed. by T. M. O’Neil and D. L. Book (Benjamin, New York, 1969).
2. R. C. Davidson, Methods in Nonlinear Plasma Theory (Academic, New York, 1972).
3. A. Hasegawa, Plasma Instabilities and Nonlinear Effects (Springer, New York, 1975).
4. V. P. Silin, Sov. Phys. JETP 20, 1510 (1965).
5. L. M. Gorbunov and V. P. Silin, Sov. Phys. JETP 22, 1347 (1966).