Multiple vs. single harmonics AC-driven atmospheric plasma jet R. Zaplotnik, Z. Kregar, M. Bišćan, A. Vesel, U. Cvelbar, M. Mozetič and S. Milošević EPL, 106 2 (2014) 25001 Published online: 07 May 2014 DOI: 10.1209/0295-5075/106/25001