1. Allen, James F. and Perrault, C. Raymond: (1980), ?Analyzing Intention in Utterances?,Artificial Intelligence 15, 143?178.
2. Appelt, Douglas E.: 1985, ?Planning English Referring Expressions?,Artificial Intelligence,26(1), 1?33.
3. Bateman, John and Paris, Cecile: 1989, ?Phrasing a Text in Terms the User Can Understand?, InProceedings of the Eleventh International Joint Conference on Artificial Intelligence, p. 1511?1517, Detroit, Michigan.
4. Brachman, R. and Schmolze, J.: 1985, ?An Overview of the KL-ONE Knowledge Representation System?,Cognitive Science 9(2), 171?216.
5. Carberry, Sandra: 1988, ?Modeling the User's Plans and Goals?,Computational Linguistics 14(3), 23?37.