Soft processes at the LHC, II: soft–hard factorisation breaking and gap survival M. G. Ryskin, A. D. Martin and V. A. Khoze Eur. Phys. J. C, 60 2 (2009) 265-272 Published online: 14 February 2009 DOI: 10.1140/epjc/s10052-009-0890-9