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  Author Title Year Publication Serial Volume Pages Links
Griffin, D.R. Animals know more than we used to think 2001 Proceedings of the National Academy of Sciences of the United States of America 2823 98 4833-4834 details   doi
Herrmann, E.; Melis, A.P.; Tomasello, M. Apes' use of iconic cues in the object-choice task 2006 Animal cognition 14 9 118-130 details   doi
Brosnan, S.F.; de Waal, F.B.M. Responses to a simple barter task in chimpanzees, Pan troglodytes 2005 Primates 167 46 173-182 details   doi
Brosnan, S.F.; de Waal, F.B.M. A concept of value during experimental exchange in brown capuchin monkeys, Cebus apella 2004 Folia primatologica; international journal of primatology 170 75 317-330 details   doi
Brosnan, S.F.; de Waal, F.B.M. Socially learned preferences for differentially rewarded tokens in the brown capuchin monkey (Cebus apella) 2004 Journal of comparative psychology (Washington, D.C. : 1983) 173 118 133-139 details   doi
Brosnan, S.F.; De Waal, F.B.M. Monkeys reject unequal pay 2003 Nature 179 425 297-299 details   doi
Martin, T.I.; Zentall, T.R. Post-choice information processing by pigeons 2005 Animal cognition 225 8 273-278 details   doi
DiGian, K.A.; Friedrich, A.M.; Zentall, T.R. Discriminative stimuli that follow a delay have added value for pigeons 2004 Psychonomic bulletin & review 226 11 889-895 details   openurl
Friedrich, A.M.; Zentall, T.R. Pigeons shift their preference toward locations of food that take more effort to obtain 2004 Behavioural processes 227 67 405-415 details   doi
Clement, T.S.; Zentall, T.R. Choice based on exclusion in pigeons 2003 Psychonomic bulletin & review 233 10 959-964 details   openurl
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