Spheroidal cap configurations of atomic clusters on planar surfaces R. A. Gherghescu, D. N. Poenaru, A. V. Solov'yov and W. Greiner Eur. Phys. J. B, 77 1 (2010) 123-132 Published online: 11 August 2010 DOI: 10.1140/epjb/e2010-00244-9