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  Author Title Year Publication Serial Volume Pages Links
Liebal, K.; Pika, S.; Tomasello, M. Social communication in siamangs (Symphalangus syndactylus): use of gestures and facial expressions 2004 Primates 2812 45 41-57 details   doi
Murai, C.; Tomonaga, M.; Kamegai, K.; Terazawa, N.; Yamaguchi, M.K. Do infant Japanese macaques ( Macaca fuscata) categorize objects without specific training? 2004 Primates 2813 45 1-6 details   doi
Reznikova, Z.I. [The study of tool use as the way for general estimation of cognitive abilities in animals] 2006 Zhurnal Obshchei Biologii 2857 67 3-22 details   openurl
Reiss, D.; Marino, L. Mirror self-recognition in the bottlenose dolphin: a case of cognitive convergence 2001 Proceedings of the National Academy of Sciences of the United States of America 2822 98 5937-5942 details   doi
Kirkwood, J.K. Animal minds and animal welfare 2000 The Veterinary Record 2856 146 327 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
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
Byrne, R.W.; Bates, L.A. Why are animals cognitive? 2006 Current Biology : CB 4708 16 R445-8 details   doi
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
Zucca, P.; Milos, N.; Vallortigara, G. Piagetian object permanence and its development in Eurasian jays (Garrulus glandarius) 2007 Animal Cognition 2423 10 243-258 details   doi
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