Two-phase X-ray burst from GX 3+1 observed by INTEGRAL J. Chenevez, M. Falanga, S. Brandt, R. Farinelli, F. Frontera, A. Goldwurm, J. J. M. in 't Zand, E. Kuulkers and N. Lund A&A, 449 1 (2006) L5-L8 Published online: 16 March 2006 DOI: 10.1051/0004-6361:200600016