@article{article93dae769,
title   = {How wild bearded capuchin monkeys select stones and nuts to minimize the number of strikes per nut cracked},
author = {Fragaszy, Dorothy and Greenberg, Rebecca and Visalberghi, Elisabetta and Izar, Patricia and Ottoni, Eduardo Benedicto and Liu, Qing},
year = {2010},
doi = {10.1016/j.anbehav.2010.04.018},
journal   = {Animal Behaviour}
}