1. N. A. Kaptsov, Corona Discharges and their Use in Electric Separators [in Russian], Gostekhizdat, Moscow (1947), p. 226.
2. L. B. Loed, Electrical Coronas, Univ. of Calif. Press, Berkeley, Los Angeles (1965), p. 694.
3. V. I. Popkov, ?Theory of corona discharges in gas at constant voltage,? Izv. Akad. Nauk SSSR, Otd. Tekh. Nauk, No. 5, 664 (1953).
4. D. V. Razevig, ?Initial voltages of a gas discharge in electric fields of various configurations,? Elektrichestvo, No. 8, 14 (1970).
5. V. V. Ushakov and E. I. Katerina, ?Calculation of the initial voltage and the potential at the start of a corona discharge on a charged cylinder in a subsonic gas flow,? in: Aerodynamics (Mezhvuz. Sb. Nauchn. Tr.), No. 3 [in Russian], Kiev (1977), pp. 85?95.