Sources
- http://www.nature.com/nature/journal/v410/n6828/full/410508a0.html
- "Orrorin tugenesis". 2001-09-16. http://www.modernhumanorigins.net/tugenensis.html. Retrieved 2007-11-26.
- "Orrorin tugenesis". 2001-09-16. http://www.modernhumanorigins.net/tugenensis.html. Retrieved 2007-11-26.
- Regal, Brian (2004). Human evolution: A guide to the debates. Santa Barbara, California, USA: ABC-CLIO..
Read more about this topic: Martin Pickford
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