Three photon production to NLO+PS accuracy at the LHC M. K. Mandal, Prakash Mathews, V. Ravindran and Satyajit Seth Eur. Phys. J. C, 74 9 (2014) 3044 Published online: 11 September 2014 DOI: 10.1140/epjc/s10052-014-3044-7