1. P. N. Dashuk, ?Investigations of mechanisms of creeping discharge and conditions of its conversion to spark stage,? collection: Phenomena in Ionized Gases, Vol. 1 [in Russian], Belgrade, 1966.
2. J. G. Anderson and T. W. Liao, AIEE Trans. I, vol. 74, 1955.
3. V. V. Bertsev, P. N. Dashuk, and G. G. Lysakovskii, Izvestiya VUZ. Energetika, vol. 6, no. 6, 1963.
4. D. V. Shishman, ?Magnitude of voltage of creepage discharge along the surface of a solid dielectric in transformer oil,? Vestn. Elektroprom., vol. 20, no. 7, 1949.
5. N. B. Trofimova, Dissertation [in Russian], Leningrad, 1966.