1. T. Gaasterland, P. Godfrey, and J. Minker. An Overview of Cooperative Answering. In: Nonstandard Queries and Nonstandard Answers, pp. 1–40, Oxford, UK, 1994. Clarendon Press.
2. G. Hirst, S. McRoy, P. Heeman, P. Edmons, and D. Horton. Repairing Conversational Misunderstandings and Non-Understandings. Technical report, University of Maryland, 1994.
3. A. Ortony, G.L. Clore, and A. Collins (eds.). The Cognitive Structue of Emotions. Cambridge University Press, Cambridge, UK, 1988.
4. K. Purang, D. Traum, D.V. Purushothaman, W. Chong, Y. Okamato, and D. Perlis. Meta-Reasoning for Intelligent Dialog Repair. Technical report, University of Maryland, 2000.
5. M. Streit. Why Are Multmodal Systems so Difficult To Build? About the Difference Between Ceictic Gestures and Direct Manipulation. In: Cooperative Multimodal Communication, Berlin Heidelberg New York, 2001. Springer.