The X-ray spectrum of the bursting atoll source 4U 1728-34 observed with INTEGRAL M. Falanga, D. Götz, P. Goldoni, R. Farinelli, A. Goldwurm, S. Mereghetti, A. Bazzano and L. Stella A&A, 458 1 (2006) 21-29 Published online: 16 October 2006 DOI: 10.1051/0004-6361:20065297