Reaching around barriers: the performance of the great apes and 3-5-year-old children
Animal Cognition (2010) - Comment
pubmed: 19653018  doi: 10.1007/s10071-009-0265-5  issn: 1435-9456  issn: 1435-9448 

Petra H. J. M. Vlamings, Brian Hare, Josep Call