Exclusive photoproduction of a heavy vector meson in QCD D. Yu Ivanov, A. Schäfer, L. Szymanowski and G. Krasnikov Eur. Phys. J. C, 34 3 (2004) 297-316 Published online: 23 March 2004 DOI: 10.1140/epjc/s2004-01712-x