1. (2) P. O’Connell, F. Heil, J. Henriot, G. Mauthe, H. Morrison, L. Niemeyer, M. Pittroff, R. Probst, and J. P. Taillebois: “SF6 in the Electric Industry, Status 2000”, CIGRE SC23.02 TF01 (2001)
2. (3) U. S. Environmental Protection Agency, Int. Conf. on SF6 and the Environment: Emission Reduction Strategies, San Diego (2002) URL: http://www.epa.gov/highgwp1/sf6/
3. (6) Greenhouse Gas Inventory Office of Japan, Emissions Data (2003) URL: http://www-gio.nies.go.jp/
4. (7) M. Shiiki, M. Hanai, and K. Suzuki: “Dielectric Strength of CO2/SF6 Gas Mixture in a Large-scale Coaxial Cylindrical Electrode System”, Proc. of Int. Symp. on High Voltage Engineering (ISH-2001), pp. 319-322 (2001)
5. (8) M. Sato, Y. Hoshina, M. Hanai, and K. Suzuki: “Dielectric Properties in High Pressure CO2 and N2 Gas Using Coaxial Cylindrical Electrode and on the Surface of Spacer”, IEEE PES T&D Conf., OR24-1, Yokohama (2002)