Animal Cognition (2015) - Comments
pubmed: 26188712  doi: 10.1007/s10071-015-0895-8  issn: 1435-9456  issn: 1435-9448 

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Elisa Maes, Guido De Filippo, Angus B Inkster, Stephen E. G. Lea, Jan De Houwer, Rudi D'Hooge, Tom Beckers, Andy J. Wills