1. and , Text Compression. Prentice Hall, Englewood Cliffs, NJ, 1990.
2. and , The Reactive Keyboard, Cambridge University Press, Cambridge, England, 1992.
3. The Reactive Keyboard: a predictive typing aid
4. and , ‘A fast compact representation of trees using hash tables’, Research Report 83/162/20, Department of Computer Science, University of Calgary, 1984.
5. ‘Adaptive predictive text generation and the reactive keyboard’, M.Sc. Thesis, Department of Computer Science, University of Calgary, Calgary, Alberta, 1988.