Language evolution references
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Arbib, M.A. and G. Rizzolatti. 1997. Neural expectations: A possible evolutionary path from manual skills to language. Communication and Cognition 29: 393-424.
Bickerton, D. 1990. Language and Species. Chicago: University of Chicago Press.
Bickerton, D. 1998. Catastrophic evolution: the case for a single step from protolanguage to full human language. In Hurtford, J.R., M. Studdert-Kennedy, and C. Knight (eds.) Approaches to the evolution of language. Cambridge: Cambridge University Pr
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Nettle, D. 1999. Linguistic Diversity. Oxford University Press: New York.
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Nowak, M.A., J.B. Plotkin, and V.A.A. Jansen. 2000 The evolution of syntactic communication. Nature 404: 495-498.
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Pinker, S. and P. Bloom. 1990. Natural language and natural selection. Behavioral and Brain Sciences 13(4): 707-784.
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Pinker, S. 1997. Evolutionary biology and the evolution of language. In M. Gopnik (ed.) The inheritance and innateness of grammars. New York: Oxford University Press: 181-208
Smith, J.M. and E. Smathmary. 1995. Chapter 17: The evolution of language. In The major transitions in evolution. New York: W.H. Freeman and Co.: 281-309.