1. R. Kompfner, “The Traveling Wave Valve,” Wireless World 53, 369 (1946).
2. J. R. Pierce, Traveling-Wave Tubes (Van Nostrand, New York, 1950; Sov. Radio, Moscow, 1952).
3. L. N. Loshakov, Zh. Tekh. Fiz. 19, 578 (1949).
4. M. F. Stel’makh, SU Patent No. 172364, 1948, in Mitrofan Fedorovich Stel’makh (FizmatlitPchelnikov, Moscow, 2004), p. 184 [in Russian].
5. M. F. Stel’makh, Radiotekh. Elektron. (Moscow) 3, 470 (1957).