S. Mana, S. Hemming, D. V. Kent, and C. J. Lepre. Temporal and Stratigraphic Framework for Paleoanthropology Sites Within East-Central Area 130, Koobi Fora, Kenya. Frontiers in Earth Science, volume 7, issue 230, 2019. C. J. Lepre and D. V. Kent. Chronostratigraphy of {KNM-ER} 3733 and other Area 104 hominins from Koobi Fora. J. Hum. Evol., Elsevier, volume 86, pages 99-111, September 2015. C. S. Feibel, C. J. Lepre, and R. L. Quinn. Stratigraphy, correlation, and age estimates for fossils from Area 123, Koobi Fora. Journal of Human Evolution, volume 57, issue 2, pages 112-122, 2009.