Lifetimes of metastable levels in Ar II P. Schef, A. Derkatch, P. Lundin, S. Mannervik, L.-O. Norlin, D. Rostohar, P. Royen and E. Biémont Eur. Phys. J. D, 29 2 (2004) 195-199 Published online: 30 March 2004 DOI: 10.1140/epjd/e2004-00043-1