1. L. I. Gudzenko and S. I. Yakovlenko, Plasma Lasers (Atomizdat, Moscow, 1978) [in Russian].
2. I. G. Ivanov, E. L. Latush, and M. F. Sem, Metal Vapor Ion Lasers (Energoatomizdat, Moscow, 1990) [in Russian].
3. Gas laser pumping by runaway electrons generated in open discharge;P. A. Bokhan,2005
4. C. E. Little, Metal Vapour Lasers: Physics, Engineering and Applications (Wiley, Chichester, England, 1999).
5. P. A. Bokhan, “Relaxation processes and influence of metastable states of metal atoms and ions on the lasing mechanism and energy characteristics of lasers,” Quantum Electron. 16 (9), 1207–1213 (1986).