Formations of negative ions in Sf6/N2 mixtures and their transport at atmospheric pressureYui Okuyama, Martin Sabo, Haruo Itoh and Štefan MatejčíkEur. Phys. J. Appl. Phys., 61 2 (2013) 24320DOI: https://doi.org/10.1051/epjap/2012120448