M. McGee, P. Gray, and S. Brewster. Haptic Human-Computer Interaction, volume 2058 of Lecture Notes in Computer Science, page 118-126. Springer, (2000)
M. Johnston, P. Cohen, D. McGee, S. Oviatt, J. Pittman, and I. Smith. Proceedings of the 35th Annual Meeting of the Association for Computational Linguistics and Eighth Conference of the European Chapter of the Association for Computational Linguistics, page 281--288. Stroudsburg, PA, USA, Association for Computational Linguistics, (1997)