1. J. Liouville, J. Math. Pures Appl.,18, 71 (1853); A. R. Forsyth, Theory of Differential Equations, New York (1959).
2. N. N. Bogolyubov, Selected Works, Vol. 2 [in Russian], Naukova Dumka, Kiev (1969); L. D. Landau, Collected Works, Vol. 2 [in Russian], Nauka (1969); H. E. W. Falkenhagen, Electrolytes, Oxford (1934); L. Spitzer, Physics of Fully Ionized Gases, Interscience, New York (1962).
3. A. N. Leznov and M. V. Saveliev, Phys. Lett. B,79, 294 (1978).
4. A. N. Leznov and M. V. Savel'ev, Preprint IFVÉ 78-177 [in Russian], Serpukhov (1978);
5. A. N. Lesnov and M. V. Saveliev, Phys. Lett. B,83, 294 (1979);