Kullback–Leibler entropy and Penrose conjecture in the Lemaître–Tolman–Bondi model Nan Li, Xiao-Long Li and Shu-Peng Song Eur. Phys. J. C, 75 3 (2015) 114 Published online: 11 March 2015 DOI: 10.1140/epjc/s10052-015-3334-8