Bickerton, D. (2000) How protolanguage became language. In Chris Knight and James R. Hurford and Michael Studdert-Kennedy, editors, The Evolutionary Emergence of Language: Social Function and the Origins of Linguistic Form . Cambridge: Cambridge University Press.

Bickerton, D. (2000) How protolanguage became language. In Chris Knight and James R. Hurford and Michael Studdert-Kennedy, editors, The Evolutionary Emergence of Language: Social Function and the Origins of Linguistic Form. Cambridge: Cambridge University Press.

2006	-	Working backwards from modern language to proto-grammar - Johansson	::
		Bickerton, D. (2000). How protolanguage became language. In Knight, Studdert-Kennedy, & Hurford (Eds.), The evolutionary emergence of language. Cambridge: Cambridge University Press.
2005	-	The Evolution of Language: A Comparative Review - Fitch	::
		Bickerton, D. (2000) "How protolanguage became language" In: Knight, C. eds. , The Evolutionary Emergence of Language: Social Function and the Origins of Linguistic Form, Cambridge University Press, Cambridge, pp 264-284
2003	-	The Transmission of Language: models of biological and cultural evolution - Smith	::	13
		---- 2000. How protolanguage became language. In Knight et al. (2000), 264-284.
2003	-	Grammatical Assimilation - Briscoe	::	8
		Bickerton, D. (2000) `How protolanguage became language' in C. Knight, M. Studdert-Kennedy and J. Hurford (ed.), The Evolutionary Emergence of Language, Cambridge University Press, Cambridge, pp. 264-284.
2003	-	Simplicity as a Driving Force in Linguistic Evolution - Brighton	::	7
		--------. 2000. How protolanguage became language. In The Evolutionary Emergence of Language, ed. by Chris Knight, Michael Studdert-Kennedy, & James R. Hurford, 264-284. Cambridge: Cambridge University Press.