1. T. Takuma, S. Hamada and O. Yamamoto:Application of a gas mixture with C-C4F8 in gas insulation, Proceedings of 11th ISH, London (1999), Paper No. 3.197. P3
2. D. R. James, L.G. Christophorou et al: Dielectric strengths of new gases and gas mixtures, Gaseous Dielectrics I, CONF-780301, p. 224251 (1978)
3. T. Takuma, T. Watanabe and K. Kita: Breakdown characteristics of compressed gas mixtures in nearly uniform fields, Proceedings of IEE, Vol. 119, pp.927928 (1972)