An XMM-Newton survey of the Local Group galaxy M 33 – variability of the detected sources Z. Misanovic, W. Pietsch, F. Haberl, M. Ehle, D. Hatzidimitriou and G. Trinchieri A&A, 448 3 (2006) 1247-1262 Published online: 03 March 2006 DOI: 10.1051/0004-6361:20053745