Bresnan, J., editor. 1982: The mental representation of grammatical relations. Cambridge, Mass.: MIT Press.
2.
Jackendoff, R.S.1977: syntax: a study of phrase structure. Cambridge, Mass.: MIT Press.
3.
Lightfoot, D.W.1979: Principles of diachronic syntax. Cambridge : Cambridge University Press.
4.
Slack, J.M.1984: Cognitive science research. In O'Shea, T. and Eisenstadt, M., editors, Artificial intelligence: tools, techniques, and applications, New York: Harper and Row.
5.
Slobin, D.I.1979: Psycholinguistics. (2nd edn.)Glenview, Ill.: Scott Foresman.