Non-linear QCD dynamics and exclusive production in ep collisions V. P. Gonçalves, M. V. T. Machado and A. R. Meneses Eur. Phys. J. C, 68 1-2 (2010) 133-139 Published online: 11 May 2010 DOI: 10.1140/epjc/s10052-010-1332-4