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  Author Title Year Publication Serial Volume Pages Links
Boysen, S.T.; Berntson, G.G. Responses to quantity: perceptual versus cognitive mechanisms in chimpanzees (Pan troglodytes) 1995 Journal of Experimental Psychology. Animal Behavior Processes 2783 21 82-86 details   openurl
Weaver, A.; de Waal, F.B.M. An index of relationship quality based on attachment theory 2002 Journal of comparative psychology (Washington, D.C. : 1983) 183 116 93-106 details   openurl
Newton-Fisher, N.E.; Lee, P.C. Grooming reciprocity in wild male chimpanzees 2011 Animal Behaviour. 5329 81 439-446 details   doi
Tanaka, M.; Tomonaga, M.; Matsuzawa, T. Finger drawing by infant chimpanzees ( Pan troglodytes) 2003 Animal Cognition 2551 6 245-251 details   doi
Imura, T.; Tomonaga, M. Perception of depth from shading in infant chimpanzees ( Pan troglodytes) 2003 Animal Cognition 2550 6 253-258 details   doi
Sousa, C.; Okamoto, S.; Matsuzawa, T. Behavioural development in a matching-to-sample task and token use by an infant chimpanzee reared by his mother 2003 Animal Cognition 2556 6 259-267 details   doi
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 details   doi
Shoshani, J.; Kupsky, W.J.; Marchant, G.H. Elephant brain. Part I: gross morphology, functions, comparative anatomy, and evolution 2006 Brain Research Bulletin 2623 70 124-157 details   doi
Reimers, M.; Schwarzenberger, F.; Preuschoft, S. Rehabilitation of research chimpanzees: stress and coping after long-term isolation 2007 Hormones and Behavior 4188 51 428-435 details   doi
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