On the origin of the γ-ray emission from the flaring blazar PKS 1222+216 F. Tavecchio, J. Becerra-Gonzalez, G. Ghisellini, A. Stamerra, G. Bonnoli, L. Foschini and L. Maraschi A&A, 534 (2011) A86 Published online: 10 October 2011 DOI: 10.1051/0004-6361/201117204