1. Allen, James F. (1983). Recognising Intentions from Natural Language Utterances. In Brady, M. & Berwick, R. C. (eds.) Computational Models of Discourse, 107?166. MIT Press: Cambridge, MA.
2. Alshawi, Hiyan (1987). Memory and Context for Language Interpretation. Cambridge University Press: Cambridge, United Kingdom.
3. Technical Note;Douglas E. Appelt,1981
4. Appelt, Douglas E. (1985). Planning English Sentences. Cambridge University Press: Cambridge, United Kingdom.
5. Austin, J. L. (1962). How To Do Things With Words (Second Edition). Urmson, J. O. & Sbisà, Marina (eds.). Harvard University Press: Cambridge, MA.