*{{cite book | author=Tattersall, Ian, Schwartz, Jeffery | title=Extinct Humans | publisher=Westview Press, Boulder CO |date=2000 |id=ISBN 0-8133-3482-9}}

*{{cite book|author=Larsen, Clark Spencer, Matter, Robert M, Gebo, Daniel L|title=Human Origins: the fossil record|publisher=Waveland Press, Prospect Heights, IL|date=1991|id=ISBN 0-88133-575-4}}