%0 Journal Article %T Social play in crested and japanese macaques: Testing the covariation hypothesis %A Petit, O. %A Bertrand, F. %A Thierry, B. %J Developmental Psychobiology %V 50 %N 4 %P 399-407 %@ 0012-1630 %D 2008-05-01 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve