1. A. S. Shlapakovskii, Pis’ma Zh. Tekh. Fiz. 25(7), 43 (1999) [Tech. Phys. Lett. 25, 267 (1999)].
2. A. S. Shlapakovski, in Intense Microwave Pulses VI, Ed. by Howard E. Brandt; Proc. SPIE 3702, 108 (1999).
3. L. A. Vainshtein and V. A. Solntsev, Lectures on Microwave Electronics (Sov. Radio, Moscow, 1973).
4. N. J. Dionne, IEEE Trans. Electron Devices 17, 365 (1970).
5. G. S. Nusinovich, Y. Carmel, T. M. Antonsen, Jr., et al., IEEE Trans. Plasma Sci. 26, 628 (1998).