Crain e Thornton (1998) e McDaniel, McKee e Cairns (1996).
- Crain, S. e R. Thornton (1998) Investigations in Universal Grammar: A Guide to Experiments in the Acquisition of Syntax and Semantics. Cambridge, MA: The MIT Press.
- McDaniel, D., C. McKee e H. Cairns (1996) Methods for Assessing Children's Syntax. Cambridge, MA: MIT Press.

de McWhinney e Snow (1985) e MacWhinney (1991).

- McWhinney, B. e C. Snow (1985) “The child language exchange system”. Journal of child language 12: 271-296.
- Mac Whinney, B. (1991) The CHILDES Project: Computatioan Tools for Analyzing Talk. Hillsdale, NJ: Lawrence Erlbaum Associates.