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  Author Title Year Publication (up) Serial Volume Pages Links
Previc, F.H. Thyroid hormone production in chimpanzees and humans: implications for the origins of human intelligence 2002 American Journal of Physical Anthropology 4108 118 402-3; discussion 404-5 details   doi
Huber, L.; Gajdon, G.K. Technical intelligence in animals: the kea model 2006 Animal Cognition 2085 9 295-305 details   doi
Hunt, G.R.; Rutledge, R.B.; Gray, R.D. The right tool for the job: what strategies do wild New Caledonian crows use? 2006 Animal Cognition 2442 9 307-316 details   doi
Mulcahy, N.J.; Call, J. How great apes perform on a modified trap-tube task 2006 Animal Cognition 2469 9 193-199 details   doi
Santos, L.R.; Pearson, H.M.; Spaepen, G.M.; Tsao, F.; Hauser, M.D. Probing the limits of tool competence: experiments with two non-tool-using species (Cercopithecus aethiops and Saguinus oedipus) 2006 Animal Cognition 2478 9 94-109 details   doi
Ducoing, A.M.; Thierry, B. Tool-use learning in Tonkean macaques (Macaca tonkeana) 2005 Animal Cognition 2508 8 103-113 details   doi
Borsari, A.; Ottoni, E.B. Preliminary observations of tool use in captive hyacinth macaws (Anodorhynchus hyacinthinus) 2005 Animal Cognition 2518 8 48-52 details   doi
Pepperberg, I.M. The value of the Piagetian framework for comparative cognitive studies 2002 Animal Cognition 2595 5 177-182 details   doi
Sterling, E.J.; Povinelli, D.J. Tool use, aye-ayes, and sensorimotor intelligence 1999 Folia Primatologica; International Journal of Primatology 4178 70 8-16 details   openurl
Whiten, A. Social complexity and social intelligence 2000 Novartis Foundation Symposium 2084 233 185-96; discussion 196-201 details   openurl
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