The Reactive Keyboard: A Predicive Typing Aid. - John J. Darragh; Ian H. Witten; Mark L. James (Computer, 1990)

Adaptive Predictive Text Generation and the Reactive Keyboard. - John J. Darragh; Ian H. Witten (Interact. Comput., 1991)

Bonsai: a Compact Representation of Trees. - John J. Darragh; John G. Cleary; Ian H. Witten (Softw. Pract. Exp., 1993)