Bose-Einstein condensation in inhomogeneous Josephson arrays R. Burioni, D. Cassi, I. Meccoli, M. Rasetti, S. Regina, P. Sodano and A. Vezzani Europhys. Lett., 52 3 (2000) 251-256 Published online: 01 September 2002 DOI: 10.1209/epl/i2000-00431-5