Dunbar, R. (2003) The Origin and Subsequent Evolution of Language. In M.H. Christiansen and S. Kirby, editors, Language Evolution: The States of the Art . Oxford University Press.

Dunbar, R. (2003) The Origin and Subsequent Evolution of Language. In M.H. Christiansen and S. Kirby, editors, Language Evolution: The States of the Art. Oxford University Press.

2003	-	Language Evolution: Consensus and Controversies - Christiansen,Kirby	::	14
2008	-	Language as shaped by the brain - Christiansen,Chater	::	5