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Author (up) Title Year Publication Serial Volume Pages
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
Fagot, J.; Wasserman, E.A.; Young, M.E. Discriminating the relation between relations: the role of entropy in abstract conceptualization by baboons (Papio papio) and humans (Homo sapiens) 2001 Journal of Experimental Psychology. Animal Behavior Processes 2772 27 316-328