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Journal of Comparative Psychology (Washington, D.C. : 1983)|March 13, 2018
Initial evidence for probabilistic reasoning in a grey parrot (Psittacus erithacus)Katherine A Clements, Suzanne L Gray, Brya Gross, et al.
Animal Cognition|January 30, 2014
Human-Grey parrot (Psittacus erithacus) reciprocity: a follow-up studyFranck Péron, Luke Thornburg, Luke Thornberg, et al.
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