Lepre, C. J.; Kent, D. V. (2010). "New magnetostratigraphy for the Olduvai Subchron in the Koobi Fora Formation, northwest Kenya, with implications for early Homo". Earth and Planetary Science Letters. 290 (3–4): 362. Bibcode:2010E&PSL.290..362L. doi:10.1016/j.epsl.2009.12.032..
"paleo-magnetic results of this study delimit the age of KNM-ER 3733 to 1.78–1.48 Ma, making it one of the most securely dated fossils ofearly African H. erectus when compared to the oldest Homo fossils from Europe and Asia."
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Lepre, C. J.; Kent, D. V. (2010). "New magnetostratigraphy for the Olduvai Subchron in the Koobi Fora Formation, northwest Kenya, with implications for early Homo". Earth and Planetary Science Letters. 290 (3–4): 362. Bibcode:2010E&PSL.290..362L. doi:10.1016/j.epsl.2009.12.032..
"paleo-magnetic results of this study delimit the age of KNM-ER 3733 to 1.78–1.48 Ma, making it one of the most securely dated fossils ofearly African H. erectus when compared to the oldest Homo fossils from Europe and Asia."
