1. V.N. Karnyushin, R.I. Soloukhin, Macroscopic and Molecular Processes in Gas Lasers [in Russian] (Atomizdat, Moscow, 1981)
2. J.I. Levatter, Shao-Chi Lin, J. Appl. Phys. 51, 210 (1980)
3. M.A. Kanatenko, Pis’ma Zh. Tekh. Fiz. 9, 214 (1983) [Sov. Tech. Phys. Lett. 9, 94 (1983)]
4. R. Dumanchin, J.C. Farcy, M. Michon, J. Rocca-Serra, Paper Presented at Sixth Intern (Quantum Electronics Conf, Kyoto, Japan, 1970)
5. Y.L. Pan, A.F. Bernhardt, J.R. Simpson, Rev. Sci. Instrum. 43, 662 (1972)