Semileptonic and rare B-meson transitions in a QCD relativistic potential model P. Colangelo, F. De Fazio, M. Ladisa, G. Nardulli, P. Santorelli and A. Tricarico Eur. Phys. J. C, 8 1 (1999) 81-90 Published online: 11 March 1999 DOI: 10.1007/s100520050446