S. W. Simpson, N. E. Levin, J. Quade, M. J. Rogers, and S. Semaw. Ardipithecus ramidus postcrania from the Gona Project area, Afar Regional State, Ethiopia. J. Hum. Evol., volume 129, pages 1-45, April 2019.

S. W. Simpson, L. Kleinsasser, J. Quade, N. E. Levin, W. C. McIntosh, N. Dunbar, S. Semaw, and M. J. Rogers. Late Miocene hominin teeth from the Gona Paleoanthropological Research Project area, Afar, Ethiopia. J. Hum. Evol., volume 81, pages 68-82, April 2015.