Structure determination, valence, and superexchange in the dimerized low temperature phase of α'-NaV2O5 A. Bernert, T. Chatterji, P. Thalmeier and P. Fulde Eur. Phys. J. B, 21 4 (2001) 535-546 Published online: 15 June 2001 DOI: 10.1007/s100510170164