Low-pressure gas breakdown in dual-frequency RF electric fields in nitrogen V. Lisovskiy, J.-P. Booth, K. Landry, D. Douai, V. Cassagne and V. Yegorenkov EPL, 80 2 (2007) 25001 Published online: 17 September 2007 DOI: 10.1209/0295-5075/80/25001