W. T. Fitch M. D. Hauser N. Chomsky 2005 The evolution of the language faculty: Clarifications and implications Cognition 97-2 179 210.
M. D. Hauser N. Chomsky W. T. Fitch 2002 The faculty of language: What is it, who has it, and how did it evolve? Science 298 1569 1579.