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Author Title Year Publication Serial Volume Pages
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
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
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
Friedrich, A.M.; Clement, T.S.; Zentall, T.R. Functional equivalence in pigeons involving a four-member class 2004 Behavioural processes 228 67 395-403
Zentall, T.R. Action imitation in birds 2004 Learning & behavior : a Psychonomic Society publication 230 32 15-23
Zentall, T.R.; Weaver, J.E.; Clement, T.S. Pigeons group time intervals according to their relative duration 2004 Psychonomic bulletin & review 231 11 113-117
Zentall, T.R.; Klein, E.D.; Singer, R.A. Evidence for detection of one duration sample and default responding to other duration samples by pigeons may result from an artifact of retention-test ambiguity 2004 Journal of experimental psychology. Animal behavior processes 232 30 129-134
Assersohn, C.; Whiten, A.; Kiwede, Z.T.; Tinka, J.; Karamagi, J. Use of leaves to inspect ectoparasites in wild chimpanzees: a third cultural variant? 2004 Primates 733 45 255-258
De Stoppelaire, G.H.; Gillespie, T.W.; Brock, J.C.; Tobin, G.A. Use of remote sensing techniques to determine the effects of grazing on vegetation cover and dune elevation at Assateague Island National Seashore: impact of horses 2004 Environmental Management 1896 34 642-649
Pinchbeck, G.L.; Clegg, P.D.; Proudman, C.J.; Morgan, K.L.; French, N.P. A prospective cohort study to investigate risk factors for horse falls in UK hurdle and steeplechase racing 2004 Equine Veterinary Journal 1898 36 595-601