1. Ya. B. Fa $$\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} $$ nberg, Fiz. Plazmy 11, 1398 (1985) [Sov. J. Plasma Phys. 11, 803 (1985)].
2. Ya. B. Fa $$\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} $$ nberg, Fiz. Plazmy 20, 613 (1994) [Plasma Phys. Rep. 20, 549 (1994)].
3. Ya. B. Fa $$\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} $$ nberg and A. A. Rukhadze, in Encyclopedia of Physics (Rossiiskaya Éntsiklopediya, Moscow, 1992), Vol. 3, p. 606.
4. Yu. P. Bliokh, M. G. Lyubarskii, and V. O. Podobinskii, Fiz. Plazmy 20, 910 (1994) [Plasma Phys. Rep. 20, 817 (1994)].
5. Yu. P. Bliokh, Ya. B. Fa $$\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} $$ nberg, M. G. Lubarsky, et al., in Proceedings of International Conference on High-Power Particle Beams, Haifa, 1998, Vol. 2, p. 699.