1. N. B. Ingels, A. Burzio, and N. P. Thompson, Rev. Sci. Instr.,37, No. 11, 1485 (1966).
2. I. V. Pentegov, Electromagnetic Processes in Converters [in Russian], Naukova Dumka, Kiev (1967), p. 166.
3. I. V. Volkov and I. V. Pentegov, Izv. Vuzov, Énergetika, No. 4, 25 (1967).
4. A. N. Milyakh, B. E. Kubyshin, and I. V. Volkov, Inductance-Capacitance Converters [in Russian], Naukova Dumka, Kiev (1964).
5. V. N. Aksenov, Rectifiers and Transformer Substations [in Russian], Ch. 2.4, Svyaz'izdat (1961).