Photon and dilepton production in the quark-gluon plasma: perturbation theory versus lattice QCD J.-P. Blaizot and F. Gelis Eur. Phys. J. C, 43 1-4 (2005) 375-380 Published online: 22 June 2005 DOI: 10.1140/epjc/s2005-02292-y