Central exclusive meson pair production in the perturbative regime at hadron colliders The KRYSTHAL Collaboration, L.A. Harland-Lang, V.A. Khoze, M.G. Ryskin and W.J. Stirling Eur. Phys. J. C, 71 8 (2011) 1714 Published online: 02 August 2011 DOI: 10.1140/epjc/s10052-011-1714-2