N. Galaske, T. Wagner, D. Strang, R. Anderl, and R. Bruder. Gestaltung der Arbeitswelt der Zukunft: 60. Frühjahrskongress der Gesellschaft für Arbeitswissenschaft, München, 25, page 360-362. Dortmund, GfA-Press, (2014)
D. Lalanne, L. Nigay, P. Palanque, P. Robinson, J. Vanderdonckt, and J. Ladr. IMCI-MLMI '09: Proceedings of the 11th International Conference on Multimodal Interfaces and the 6th Workshop on Machine Learning for Multimodal Interfaces, Cambridge, MA, USA, page 153-160. (2009)
L. Chen, J. Hoey, C. Nugent, D. Cook, and Z. Yu. IEEE Transactions on Systems, Man, and Cybernetics, Part C: Applications and Reviews, 42 (6):
790-808(November 2012)