Next-to-leading order QCD corrections to spin-dependent hadron-pair photoproduction C. Hendlmeier, A. Schäfer and M. Stratmann Eur. Phys. J. C, 55 4 (2008) 597-605 Published online: 27 May 2008 DOI: 10.1140/epjc/s10052-008-0626-2