1. B. B. Kadomtsev, Plasma Turbulence, Academic Press, New York 1965.
2. L.I. Rudakov, Sov. Phys. JETP 21, 917 (1965).
3. T.H. Dupree, Phys. Fluids 10, 1049 (1967).
4. T.H. Dupree, Phys. Fluids 9, 1773 (1966).
5. J. Weinstock, Phys. Fluids 12, 1045 (1969).