Redundant food searches by capuchin monkeys (Cebus apella): a failure of metacognition?
Animal Cognition (2006) - Comment
pubmed: 16184375  doi: 10.1007/s10071-005-0007-2  issn: 1435-9448  issn: 1435-9456 

Annika Paukner, James R. Anderson, Kazuo Fujita