A. Bunt, C. Conati, and J. Mcgrenere. Proceedings of the 9th international conference on Intelligent user interfaces, page 117--124. New York, NY, USA, ACM, (2004)
M. Wiebe, D. Geiskkovitch, and A. Bunt. Proceedings of the 21st International Conference on Intelligent User Interfaces, page 43--47. New York, NY, USA, ACM, (2016)