1. Allen, J. F., Frisch, A. M. and Litman, D. J. 1982. ARGOT: the Rochester dialogue system. In Proceedings of the National Conference on Artificial Intelligence. Pittsburgh, PA.
2. Chin, D. N. 1986. User modeling in UC, the UNIX consultant. In Proceedings of the CHI-86 Conference, Boston, MA, April.
3. Cox, C. A. 1986 ALANA: Augmentable LANguage Analyzer Computer Science Division, University of California, Berkeley, Report No. UCB/CSD 86 /283.
4. Deering, M., Faletti, J., and Wilensky, R. 1982 Using the PEARL AI Package Computer Science Division, University of California, Berkeley, Memorandum No. UCB/ERL M82 /19
5. Jacobs, P. S. 1984. PHRED: A Generator for Natural Language Interfaces Computer Science Division, University of California, Berkeley, Report No. UCB/CSD 84 /189.