1. N. V. Cherepnin, Sorption in Vacuum Technology (Sov. Radio, Moscow, 1973) [in Russian].
2. E. A. Litvinov, G. A. Mesyats, and A. F. Shubin, Izv. Vyssh. Uchebn. Zaved. Fiz., No. 4, 149 (1970).
3. A. A. Yemelyanov, G. M. Kassirov, and G. V. Smirnov, Izv. Vyssh. Uchebn. Zaved. Fiz., No. 4, 142 (1976).
4. A. A. Yemelyanov and G. M. Kassirov, Izv. Vyssh. Uchebn. Zaved. Fiz., No. 9, 105 (1976).
5. B. Jüttner, W. Rohrbeck, and H. Wolff, in Proceedings of the 9th International Conference on Phenomena in Ionized Gases, Bucharest, 1969, p. 140.