Singly and doubly charged clusters of (S2) metals. Ab initio and model calculations on Mg+n and Mgn++n(n ≤ 5) G. Durand, J.-P. Daudey et J.-P. Malrieu J. Phys. France, 47 8 (1986) 1335-1346 DOI: 10.1051/jphys:019860047080133500