Fitch, W. T. , Hauser, M. D. , and Chomsky, N. (2005) The evolution of the language faculty: Clarifications and implications. Cognition , 97(2):179--210.

Fitch, W. T., Hauser, M. D., and Chomsky, N. (2005) The evolution of the language faculty: Clarifications and implications. Cognition, 97(2):179--210.

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Locke,Bogin, Language and life history: A new perspective on the development and evolution of human language, 2006	::	2
Parker, Evolving the narrow language faculty: was recursion the pivotal step?, 2006	::