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pubmedcentral.nih.gov
Stringer, C. (2016). "The origin and evolution of Homo sapiens". Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences371 (1698): 20150237. PMID27298468. PMC4920294. //www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=4920294.