1. A. A. Lisochenko and F. I. Vilisov, Usp. Foton., No. 4, 18–26 (1974).
2. L. G. Kositsyn, M. M. Mikhailov, N. Ya. Kuznetsov, and Mi. I. Dvoretskii, Prib. Tekh. Éksp., No. 4, 176–180 (1985).
3. M. M. Mikhailov and V. V. Sharafutdinova, Izv. Vyssh. Uchebn. Zaved., Fiz., No. 9, 106–112 (1997).
4. V. D. Chernyi, Abstract for Dissertation for Candidate of Phys.-Mat. Science, MIET, Moscow (1997).
5. I. Ya. Melnik-Gaikazyan, Proceedings of the Interuniversity Conference on Radiation Physics, Tomsk Gos. U., Tomsk (1970), pp. 38–45.