J. Niekrasz, and M. Purver. Proceedings of the 2nd Joint Workshop on Multimodal Interaction and
Related Machine Learning Algorithms (MLMI), page 162--173. (2005)
J. Niekrasz, M. Purver, J. Dowding, and S. Peters. Proceedings of the 2005 AAAI Spring Symposium on Persistent Assistants:
Living and Working with AI, Stanford, California, USA, (March 2005)