1. A. J. Toepfer and L. P. Bradley, J. Appl. Phys. 43, 3033 (1972).
2. L. P. Babich, N. G. Pavlovskaya, and S. L. Él’yash, Izv. Vyssh. Uchebn. Zaved., Radiofiz. 18(5), 769 (1975).
3. G. A. Mesyats, Ectons in Vacuum Discharge: Break-down, Spark, Arc (Nauka, Moscow, 2000).
4. L. P. Babich, T. V. Loiko, and V. A. Tsukerman, Usp. Fiz. Nauk 160(7), 49 (1990) [Sov. Phys. Usp. 33, 521 (1990)].
5. L. P. Babich and T. V. Loiko, Dokl. Akad. Nauk SSSR 313, 846 (1990) [Sov. Phys. Dokl. 35, 750 (1990)].