1. I. N. Slivkov, High-Voltage Processes in Vacuum [in Russian], Energoatomizdat, Moscow (1986).
2. A. F. Aleksandrov, L. G. Blyakhman, S. Yu. Galuzo, and V. E. Nechaev, in: Relativistic High-Frequency Electronics [in Russian], 3, IAP RAS, Gorky (1983), p. 219.
3. V. Semenov, V. Nechaev, and E. Rakova, Proc. Int. Workshop on Strong Microwaves in Plasmas. V. 2, Inst. Appl. Phys. RAS (2006), p. 635.
4. R. Fuks, Microwave J., 54, No. 5, 206 (2011).
5. Yu. Ming, IEEE Microwave Magazine, 8, No. 5, 88 (2007).