Study of the cyclotron feature in MXB 0656-072 V. A. McBride, J. Wilms, M. J. Coe, I. Kreykenbohm, R. E. Rothschild, W. Coburn, J. L. Galache, P. Kretschmar, W. R. T. Edge and R. Staubert A&A, 451 1 (2006) 267-272 Published online: 25 April 2006 DOI: 10.1051/0004-6361:20054239