Batali, John 1998 ``Computational simulations of the emergence of grammar''. In Approaches to the evolution of language: Social and cognitive bases, edited by James R Hurford, Michael Studdert-Kennedy and Chris Knight, 405-426, Cambridge University Press.

Briscoe, Ted, (ed.) forthcoming, Linguistic Evolution through Language Acquisition: Formal and Computational Models, Cambridge University Press.

Brown, E.Keith and Jim Miller (eds), 1996 Concise Encyclopedia of Syntactic Theories, Pergamon (Elsevier Science Ltd.), Oxford.

Hurford, James R, forthcoming ``Expression/induction models of language evolution: dimensions and issues'', to appear in Linguistic Evolution through Language Acquisition: Formal and Computational Models, edited by Ted Briscoe, Cambridge University Press.

Kirby, Simon, forthcoming, ``Learning, Bottlenecks and the Evolution of Recursive Syntax'', to appear in Linguistic Evolution through Language Acquisition: Formal and Computational Models, edited by Ted Briscoe, Cambridge University Press.

Lightfoot, David, 1991 ``Subjacency and Sex'', Language and Communication, 11:67-69.

Lock, Andrew, and Charles Peters 1996 Handbook of Human Symbolic Evolution, Clarendon Press, Oxford.

Newmeyer, Frederick, 1991 ``Functional Explanation in Linguistics and the Origin of Language'' Language and Communication, 11:3-28.

Pinker, Steven, and Paul Bloom, 1990 ``Natural Language and Natural Selection'', Behavioral and Brain Sciences, 13:707-784.