Kramer, A (1993). «Human Taxonomic Diversity in the Pleistocene: Does Homo erectus Represent Multiple Hominid Species?». American Journal of Physical Anthropology91 (2): 161–171. doi:10.1002/ajpa.1330910203. PMID8317558.
Kramer, A (1993). «Human Taxonomic Diversity in the Pleistocene: Does Homo erectus Represent Multiple Hominid Species?». American Journal of Physical Anthropology91 (2): 161–171. doi:10.1002/ajpa.1330910203. PMID8317558.