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3. L. A. Kvasnikov, V. Z. Kaibyshev, and A. G. Kalandarishvili, Working Processes in Thermionic Converters in Nuclear Power Facilities, Izd. MAI, Moscow (2001).
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5. I. P. Stakhanov and I. I. Kasikov, “On the current–voltage characteristics of a low-voltage arc discharge,” ibid., 39, No. 8, 1496–1505 (1969).