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Seiffert, E.R., Simons, E.L., Clyde, W.C., Rossie, J.B., Attia, Y., Bown, T.M., Chatrath, P. & Mathison, M.E. 2005. Basal Anthropoids from Egypt and the Antiquity of Africa's Higher Primate Radiation. Science 310 (5746), 14 Oct 2005: 300-304.