Diversification in vipers: phylogenetic relationships, time of divergence and shifts in speciation rates - Alencar, Laura R. V; Quental, Tiago; Grazziotin, Felipe G; Alfaro, Michael L; Martins, Marcio; Venzon, Mericien; Zaher, Hussam El Dine (Molecular Phylogenetics and Evolution, 2016)