Dawkins, Richard (2004). The Ancestor's Tale: A Pilgrimage To the Dawn of Life. London: Weidenfeld & Nicolson. str. 77. ISBN0-297-82503-8.Greška u referenci: Nevaljana oznaka <ref>; naziv "Dawkins2004" je zadan više puta s različitim sadržajem
Klein, R. (1999). The Human Career. University of Chicago Press.
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Wood, B. & Strait, D. (2004). „Patterns of resource use in early Homo and Paranthropus”. Journal of Human Evolution46 (2): 119–162. DOI:10.1016/j.jhevol.2003.11.004. PMID14871560.
Wood, B. & Strait, D. (2004). „Patterns of resource use in early Homo and Paranthropus”. Journal of Human Evolution46 (2): 119–162. DOI:10.1016/j.jhevol.2003.11.004. PMID14871560.