XMM–Newton observations of a sample of γ-ray loud active galactic nuclei L. Foschini, G. Ghisellini, C. M. Raiteri, F. Tavecchio, M. Villata, L. Maraschi, E. Pian, G. Tagliaferri, G. Di Cocco and G. Malaguti A&A, 453 3 (2006) 829-838 Published online: 28 June 2006 DOI: 10.1051/0004-6361:20064921