P. Green, and S. Harper. International Conference on Computers Helping People with Special Needs, page 281--288. Germany, OCG Press, (July 2000)Under the auspices of the UNESCO.
C. Goble, S. Harper, and R. Stevens. Proceedings of the Eleventh ACM on Hypertext and hypermedia, page 1--10. New York, USA, ACM Press, (June 2000)Winner of the Doug Engelbart Award for Best Paper.