Niyogi, P. and Berwick, R. C. (1997) Populations of Learners: The Case of European Portuguese. In Proceedings of the Nineteenth Annual Conference of the Cognitive Science Society . Stanford, CA.

Cavalli-Sforza, L. &Feldman, M. (1981). A Mathematical Model of Cultural Transmission. Princeton, NJ: Princeton University Press.	Google
Clark, R. & Roberts, I. (1991). A Computational Model of Language Learnability and Language Change. Linguistic Inquiry, 24(2), 299-345.	Google	UIUC
Galves, A., & Galves, C. (1995). A case study of prosodydriven language change: from classical to modern European Portuguese. Unpublished M.S., University of Sao Paolo, Sao Paolo, Brasil.	Google
Gibson, E., &Wexler, K. (1994). Triggers. Linguistic Inquiry, 25(4), 407--454.	Google
Gold, E., (1967). Language identification in the limit. Information and Control, 10, 447--474.	Google	UIUC
Kroch, A. (1990) Reflexes of grammar in patterns of language change. Language Variation and Change, 199--243.	Google	UIUC
Niyogi, P., & Berwick, R., (1997, to appear). A dynamical systems model for language change. Linguistics and Philosophy.	Google	UIUC