Broad band variability of SS433: accretion disk at work? M. Revnivtsev, S. Fabrika, P. Abolmasov, K. Postnov, I. Bikmaev, R. Burenin, M. Pavlinsky, R. Sunyaev, I. Khamitov and N. Sakhibullin A&A, 447 2 (2006) 545-551 Published online: 07 February 2006 DOI: 10.1051/0004-6361:20052755