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de Waal, F. B. (1999). The end of nature versus nurture. Sci Am, 281(6), 94–99.
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Parr, L. A., & de Waal, F. B. (1999). Visual kin recognition in chimpanzees (Vol. 399).
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Slagsvold, T., & Viljugrein, H. (1999). Mate choice copying versus preference for actively displaying males by female pied flycatchers. Anim. Behav., 57(3), 679–686.
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White, D. J., & Galef Jr, B. G. (1999). Mate choice copying and conspecific cueing in Japanese quail,Coturnix coturnix japonica. Anim. Behav., 57(2), 465–473.
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Pell, S. M., & McGreevy, P. D. (1999). Prevalence of stereotypic and other problem behaviours in thoroughbred horses. Aust Vet J, 77(10), 678–679.
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Pennisi, E. (1999). Are out primate cousins 'conscious'? (Vol. 284).
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Swanson, J. C. (1999). What are animal science departments doing to address contemporary issues? J. Anim Sci., 77(2), 354–360.
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Pinker, S. (1999). COGNITION:Enhanced: Out of the Minds of Babes. Science, 283(5398), 40–41.
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Hauser MD, Kralik J, & Botto-Mahan C. (1999). Problem solving and functional design features: experiments on cotton-top tamarins, Saguinus oedipus oedipus. Anim. Behav., 57, 565.
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Weed M.R., Taffe M.A., Polis I., Roberts A.C., Robbins T.W., Koob G.F., et al. (1999). Performance norms for a rhesus monkey neuropsychological testing battery: acquisition and long-term performance. Cognitive Brain Research, 8, 185–201.
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