Mulchay, J. B. (8 March 2013). "How long do chimpanzees live?". Chimpanzee Sanctuary Northwest. เก็บจากแหล่งเดิมเมื่อ 28 March 2019. สืบค้นเมื่อ 28 March 2019.
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Povinelli, D.; de Veer, M.; Gallup Jr., G.; Theall, L.; van den Bos, R. (2003). "An 8-year longitudinal study of mirror self-recognition in chimpanzees (Pan troglodytes)". Neuropsychologia. 41 (2): 229–334. doi:10.1016/S0028-3932(02)00153-7. PMID12459221. S2CID9400080.
Calhoun, S. & Thompson, R. L. (1988). "Long-term retention of self-recognition by chimpanzees". American Journal of Primatology. 15 (4): 361–365. doi:10.1002/ajp.1350150409. PMID31968884. S2CID84381806.
Povinelli, D.; de Veer, M.; Gallup Jr., G.; Theall, L.; van den Bos, R. (2003). "An 8-year longitudinal study of mirror self-recognition in chimpanzees (Pan troglodytes)". Neuropsychologia. 41 (2): 229–334. doi:10.1016/S0028-3932(02)00153-7. PMID12459221. S2CID9400080.
Calhoun, S. & Thompson, R. L. (1988). "Long-term retention of self-recognition by chimpanzees". American Journal of Primatology. 15 (4): 361–365. doi:10.1002/ajp.1350150409. PMID31968884. S2CID84381806.
Povinelli, D.; de Veer, M.; Gallup Jr., G.; Theall, L.; van den Bos, R. (2003). "An 8-year longitudinal study of mirror self-recognition in chimpanzees (Pan troglodytes)". Neuropsychologia. 41 (2): 229–334. doi:10.1016/S0028-3932(02)00153-7. PMID12459221. S2CID9400080.
Calhoun, S. & Thompson, R. L. (1988). "Long-term retention of self-recognition by chimpanzees". American Journal of Primatology. 15 (4): 361–365. doi:10.1002/ajp.1350150409. PMID31968884. S2CID84381806.
Mulchay, J. B. (8 March 2013). "How long do chimpanzees live?". Chimpanzee Sanctuary Northwest. เก็บจากแหล่งเดิมเมื่อ 28 March 2019. สืบค้นเมื่อ 28 March 2019.