Combined experimental and theoretical study of small aluminum oxygen clusters S. Neukermans, N. Veldeman, E. Janssens, P. Lievens, Z. Chen and P.v.R. Schleyer Eur. Phys. J. D, 45 2 (2007) 301-308 Published online: 05 October 2007 DOI: 10.1140/epjd/e2007-00283-5