1. Brennan, S.E. and E.A. Hulteen, Interaction and feedback in a spoken
language system: a theoretical framework. Knowlege-Based Systems, 1995.
8(2-3): p. 143-151.
1. Nickerson, R.S., Some Characteristics of Conversations, in Man-Computer
Interaction: Human Factors Aspects of Computers and People, B. Shackel,
Editor. 1981, Sijthoff & Noordhoff: Rockville, MD. p. 53-64.