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Author | Title | Year | Publication | Serial | Volume | Pages |
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Beran, M.J.; Beran, M.M.; Harris, E.H.; Washburn, D.A. | Ordinal judgments and summation of nonvisible sets of food items by two chimpanzees and a rhesus macaque | 2005 | Journal of Experimental Psychology. Animal Behavior Processes | 2766 | 31 | 351-362 |
Harris, E.H.; Washburn, D.A. | Macaques' (Macaca mulatta) use of numerical cues in maze trials | 2005 | Animal Cognition | 2498 | 8 | 190-199 |