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.

2007	-	Language as Shaped by the Brain - Christiansen,Chater	::
		Dunbar, R.I.M. (2003). The origin and subsequent evolution of language. In M.H. Christiansen, & S. Kirby (Eds.), Language evolution (pp. 219-234). New York: Oxford University Press.
2003	-	Language Evolution: Consensus and Controversies - Christiansen,Kirby	::	8
		8 Dunbar, R. (2003) The origin and subsequent evolution of language. In Language Evolution (Christiansen, M.H. and Kirby, S., eds) Oxford University Press