1. L. S. Polak, P. A. Sergeev, and D. I. Slovetskii, Teplofiz. Vys. Temp. 15, 15 (1977).
2. Yu. B. Golubovskii and V. M. Telezhko, Teplofiz. Vys. Temp. 22, 428 (1984).
3. Yu. S. Akishev, K. V. Baiadze, V. M. Vetsko, et al., Fiz. Plazmy 11, 999 (1985) [Sov. J. Plasma Phys. 11, 582 (1985)].
4. A. V. Berdyshev, I. V. Kochetov, and A. P. Napartovich, Fiz. Plazmy 14, 741 (1988) [Sov. J. Plasma Phys. 14, 438 (1988)].
5. A. V. Berdyshev, A. S. Golovin, V. A. Gurashvili, et al., Fiz. Plazmy 15, 335 (1989) [Sov. J. Plasma Phys. 15, 195 (1989)].