Pulse-amplitude-resolved spectroscopy of bright accreting pulsars: indication of two accretion regimesD. Klochkov, R. Staubert, A. Santangelo, R. E. Rothschild and C. FerrignoA&A, 532 (2011) A126DOI: https://doi.org/10.1051/0004-6361/201116800
