F. Jourde, Y. Laurillau, A. Moran, и L. Nigay. Interactive Systems: Design, Specification, and Verification, 15th International Workshop, DSV-IS 2008, Kingston, Canada, стр. 281-286. (2008)
M. Johnston. Proceedings of the 11th International Conference on Multimodal Interfaces and the 6th Workshop on Machine Learning for Multimodal Interfaces (ICMI-MLMI '09), Cambridge, MA, USA, стр. 47-54. (2009)