(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)
(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/