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Author Title Year Publication Serial Volume Pages
de Waal, F.B.M.; Davis, J.M. Capuchin cognitive ecology: cooperation based on projected returns 2003 Neuropsychologia 182 41 221-228
Tebbich, S.; Bshary, R.; Grutter, A.S. Cleaner fish Labroides dimidiatus recognise familiar clients 2002 Animal Cognition 2599 5 139-145
Lonon, A.M.; Zentall, T.R. Transfer of value from S+ to S- in simultaneous discriminations in humans 1999 The American journal of psychology 249 112 21-39
de Waal, F.B. Food transfers through mesh in brown capuchins 1997 Journal of comparative psychology (Washington, D.C. : 1983) 198 111 370-378