1. N. V. Filippov, T. J. Filippova, and V. P. Vinogradov, Nucl. Fusion Suppl., Pt. 2, 557 (1962).
2. J. W. Mather, Phys. Fluids 8, 366 (1965).
3. V. I. Krauz, in Encyclopedia of Low-Temperature Plasma, Ed. by V. E. Fortov, Ser. B, Vol. IX-2: High-Energy Plasmadynamics, Ed. by A. S. Kingsep (YanusK, Moscow, 2007), p. 152 [in Russian].
4. V. V. Vikhrev, V. V. Ivanov, and G. A. Rozanova, Sov. J. Plasma Phys. 15, 44 (1989).
5. N. V. Filippov, Sov. J. Plasma Phys. 9, 14 (1983).