1. R.A. Bolt, “Put-that-there”: voice and gesture at the graphics interface, Seventh Annual International Conference on Computer Graphics and Interactive Techniques, ACM, Seattle, Washington, US, 1980, pp. 262–270.
2. Evaluation of Spoken Multimodal Conversation. Sixth International Conference on Multimodal Interaction (ICMI’2004);Bernsen,2004
3. Multimodal interfaces. Human–computer interaction handbook: fundamentals;Oviatt,2003
4. Speech–gesture driven multimodal interfaces for crisis management;Sharma;Proc. IEEE VR2004,2003
5. R. Catizone, A. Setzer, Y. Wilks, Multimodal Dialogue Management in the COMIC Project. EACL 2003 Workshop on Dialogue Systems: Interaction, Adaptation, and Styles of Management, 2003, http://www.hcrc.ed.ac.uk/comic/documents/publications/eaclCOMICFinal.pdf.