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2. G.M. Kassirov, G.A. Mesyats: [Engl. transi.: Sov. Phys. Tech. Phys. 9, 1141–1145 (1964)]
3. G.M. Kassirov, B.M. Koval’chuk: Zh. Tech. Fiz. 34, 484–487 (1964)
4. G.M. Kassirov, B.M. Koval’chuk: [Engl. transi.: Sov. Phys.-Tech. Phys. 9, 377–379 (1964)]
5. S. Dushman: Scientific Foundations of Vacuum Technique, 2nd. ed. (Wiley, New York 1962) Chap. 6, pp. 331–379