1. Richard A. Bolt. “The integrated multi-modal interface” in The Transactions of the Institute of Electronics, Information and Communication Engineering, Vol. J70-D, no 11, pp. 2017–2025 (1987)
2. NATO ASI Series, Series F; Computer and Systems Sciences;H Bunt,1988
3. H.C. Bunt. “Information Dialogues as Communicative Action in Relation to Partner Modeling and Information Processing” in The Structure of Multimodal Dialogue, M.M. Taylor, F. Néel and D.G. Bouwhuis (Editors) Elsevier Science Publishers B.V. (1989)
4. NATO ASI Series, Series F; Computer and Systems Sciences;N Carbonell,1988
5. N. Carbonnell and J.M. Pierrel. “Architecture and Knowledge Sources in a Human-Computer Oral Dialogue System” in The Structure of Multimodal Dialogue, pp. 417–429, M.M. Taylor, F. Néel and D.G. Bouwhuis (Editors) Elsevier Science Publishers B.V. (1989)