P. Lucey, G. Potamianos, and S. Sridharan. Proceedings of AVSP'07: International Conference on Auditory-Visual Speech Processing, Kasteel Groenendaal, Hilvarenbeek, The Netherlands, (2007)
J. Luo, J. Yu, D. Joshi, and W. Hao. MM '08: Proceedings of the 16th ACM International Conference on Multimedia, Vancouver, Canada, page 1071-1080. (2008)
H. Pirsiavash, and D. Ramanan. Proceedings of the 2014 IEEE Conference on Computer Vision and Pattern Recognition (CVPR), Columbus, OH, USA, page 612-619. (2014)
M. Beetz, M. Buss, and D. Wollherr. KI 2007: Advances in Artificial Intelligence, volume 4667 of Lecture Notes in Artificial Intelligence, Springer, Berlin, (2007)
C. Fernández Tena, P. Baiget, X. Roca, and J. Gonzàlez. KI 2007: Advances in Artificial Intelligence, volume 4667 of Lecture Notes in Artificial Intelligence, Springer, Berlin, (2007)
G. Herzog, and K. Rohr. KI-95: Advances in Artificial Intelligence, 19th Annual German Conference on Artificial Intelligence, Bielefeld, Germany, volume 981 of Lecture Notes in Artificial Intelligence, Springer, Berlin, (1995)