INTEGRAL observation of the accreting pulsar GX 1+4 C. Ferrigno, A. Segreto, A. Santangelo, J. Wilms, I. Kreykenbohm, M. Denis and R. Staubert A&A, 462 3 (2007) 995-1005 Published online: 03 November 2006 DOI: 10.1051/0004-6361:20053878