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3. Natural history of Homo erectus;Anton;Yearbook of Physical Anthropology,2003
4. The fissuration on the frontal lobe of Sinanthropus pekinensis Black, compared with the fissuration in Neanderthal men;Ariens-Kappers;Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen,1934
5. Comparison of the endocranial casts of the Pithecanthropus erectus skull found by Dubois and von Koenigswald's Pithecanthropus skull;Ariens-Kappers;Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen,1939