Lightfoot, D. (2000) The spandrels of the linguistic genotype. 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.

Lightfoot, D. (2000) The spandrels of the linguistic genotype. 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.

2004	-	Self-organization and Language Evolution: System, Population and Individual - Ke	::
		Lightfoot, D. (2000). The spandrels of the linguistic genotype. In Knight, C., Hurford, J. R., and Studdert-Kennedy, M., editors, The Evolutionary Emergence of Language: Social Function and the Origins of Linguistic Form. Cambridge University Press, Cambridge.
2003	-	Grammatical Assimilation - Briscoe	::	8
		Lightfoot, D. (2000) `The spandrels of the linguistic genotype' in C. Knight, M. Studdert-Kennedy and J. Hurford (ed.), The Evolutionary Emergence of Language, Cambridge University Press, Cambridge, pp. 231-247.