1. Charles R Berger. 2008. Interpersonal communication. The international encyclopedia of communication (2008).
2. Richard A Bolt. 1980. "Put-that-there": Voice and gesture at the graphics interface. Vol. 14. ACM.
3. Susan E Brennan. 1991. Conversation with and through computers. User modeling and user-adapted interaction 1, 1 (1991), 67--86.
4. Susan E Brennan. 2012. Conversation and dialogue. Encyclopedia of the Mind. SAGE Publications (2012).
5. Philip R Cohen, Michael Johnston, David McGee, Sharon L Oviatt, Jay Pittman, Ira A Smith, Liang Chen, and Josh Clow. 1997. QuickSet: Multimodal Interaction for Distributed Applications. In ACM Multimedia, Vol. 97. 31--40.