Wolfgang Wahlster. Dialogue Systems Go Multimodal: The SmartKom Experience.  In SmartKom: Foundations of Multimodal Dialogue Systems, Springer, Heidelberg,   2006.
 @InBook{Wahl2006,
        AUTHOR = {Wahlster, Wolfgang},
        TITLE = {Dialogue Systems Go Multimodal: The SmartKom Experience},
        YEAR = {2006},
        BOOKTITLE = {SmartKom: Foundations of Multimodal Dialogue Systems},
        ADDRESS = {Heidelberg},
        PUBLISHER = {Springer} } 
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