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.

2008	-	Language as shaped by the brain - Christiansen,Chater	::	5
		Dunbar, R. I. M. (2003) The origin and subsequent evolution of language. In: Language evolution, ed. M. H. Christiansen & S. Kirby, pp. 219-34. Oxford University Press.
2003	-	Language Evolution: Consensus and Controversies - Christiansen,Kirby	::	14
		8 Dunbar, R. (2003) The origin and subsequent evolution of language. In Language Evolution (Christiansen, M.H. and Kirby, S., eds) Oxford University Press