1. W. Link, IEEE Trans. Nucl. Sci. (June, 1967).
2. Ya. S. Itskhoki, Pulse Networks [in Russian], Sovetskoe Radio, Moscow (1969).
3. V. N. Lopukhin, Excitation of Electromagnetic Oscillations and Waves by Electron Streams [in Russian], Gostekhizdat, Moscow (1963).
4. O. A. Kolpakov and V. I. Kotov, Zh. Tekh. Fiz.,34, 1387 (1964).
5. L. A. Vainshtein, Electromagnetic Waves [in Russian], Sovetskoe Radio, Moscow (1967).