S. Oviatt, R. Coulston, и R. Lunsford. Proceedings of the 6th international conference on Multimodal interfaces, стр. 129--136. New York, NY, USA, ACM, (2004)
R. Neßelrath, и M. Feld. Adjunct Proceedings of the 5th International Conference on Automotive User Interfaces and Interactive Vehicular Applications, Eindhoven, стр. 49-52. (октября 2013)
R. Neßelrath. Proceedings of the 9th International Conference on Intelligent Environments (IE). International Conference on Intelligent Environments (IE-13), July 18-19, Athen, Greece, стр. 266-269. Washington, DC, USA, IEEE Computer Society, (2013)