A. Arthur, R. Lunsford, M. Wesson, и S. Oviatt. Proceedings of the 8th international conference on Multimodal interfaces, стр. 209--216. New York, NY, USA, ACM, (2006)
D. Sonntag, M. Deru, и S. Bergweiler. Proceedings of the 2009 International Conference on Artificial Intelligence, ICAI 2009, July 13-16, 2009, Las Vegas Nevada, USA, 2 Volumes, стр. 974--979. (2009)
M. Morris, и E. Horvitz. Proceedings of the 20th annual ACM symposium on User interface software and technology, стр. 3--12. New York, NY, USA, ACM, (2007)
D. Pareek, M. Jhaveri, M. Kapasi, и M. Trivedi. International Journal of Computer Science, Engineering and Information Technology (IJCSEIT), 2 (5):
45-54(октября 2012)