Lou Boves Andre Neumann Louis Vuurpijl Louis ten Bosch Stéphane Rossignol Ralf Engel Norbert Pfleger Multimodal Interaction in Architectural Design Applications. 384-390 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3196&spage=384 2004 conf/uiall/2004 User Interfaces for All db/conf/uiall/uiall2004.html#BovesNVBREP04