F. Grasso. Artificial Intelligence in Medicine - 9th Conference on Artificial Intelligence in Medicine in Europe, AIME
, volume 2780 of LNAI, page 179--188. Springer-Verlag, (2003)
H. Hulstijn, R. Steetskamp, H. Doest, S. Burgt, and A. Nijholt. Proceedings of the Twente Workshop on Language Technology: Dialogue Management in Natural Language Systems
, page 89--99. The Netherlands, Enschede, (1996)