Photoabsorption resonances of Na 20, Na 21Cl and Na 22Cl 2 clusters C. Xia, C. Yin and V. V. Kresin Eur. Phys. J. D, 52 1-3 (2009) 183-185 Published online: 24 January 2009 DOI: 10.1140/epjd/e2008-00269-9