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  Author Title Year Publication Serial Volume Pages Links
Vonk, J. Gorilla ( Gorilla gorilla gorilla) and orangutan ( Pongo abelii) understanding of first- and second-order relations 2003 Animal Cognition 2578 6 77-86 details   doi
Matzke, S.M.; Oubre, J.L.; Caranto, G.R.; Gentry, M.K.; Galbicka, G. Behavioral and immunological effects of exogenous butyrylcholinesterase in rhesus monkeys 1999 Pharmacology, Biochemistry, and Behavior 4064 62 523-530 details   openurl
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 details   openurl
Clement, T.S.; Feltus, J.R.; Kaiser, D.H.; Zentall, T.R. “Work ethic” in pigeons: reward value is directly related to the effort or time required to obtain the reward 2000 Psychonomic bulletin & review 248 7 100-106 details   openurl
Klein, E.D.; Bhatt, R.S.; Zentall, T.R. Contrast and the justification of effort 2005 Psychonomic bulletin & review 223 12 335-339 details   openurl
Nguyen, N.H.; Klein, E.D.; Zentall, T.R. Imitation of a two-action sequence by pigeons 2005 Psychonomic bulletin & review 221 12 514-518 details   openurl
Curtis, S.E.; Stricklin, W.R. The importance of animal cognition in agricultural animal production systems: an overview 1991 Journal of Animal Science 2754 69 5001-5007 details   openurl
Duncan, I.J.; Petherick, J.C. The implications of cognitive processes for animal welfare 1991 Journal of Animal Science 2753 69 5017-5022 details   openurl
Bshary, R.; Wickler, W.; Fricke, H. Fish cognition: a primate's eye view 2002 Animal Cognition 2617 5 1-13 details   doi
De Boyer Des Roches, A.; Richard-Yris, M.-A.; Henry, S.; Ezzaouia, M.; Hausberger, M. Laterality and emotions: visual laterality in the domestic horse (Equus caballus) differs with objects' emotional value 2008 Physiology & Behavior 4762 94 487-490 details   doi
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