P. Lucey, G. Potamianos, and S. Sridharan. Proceedings of AVSP'07: International Conference on Auditory-Visual Speech Processing, Kasteel Groenendaal, Hilvarenbeek, The Netherlands, (2007)
K. Kumatani, and R. Stiefelhagen. Proceedings of ICASSP'07: IEEE International Conference on Acoustics, Speech and Signal Processing, Honolulu, Hawaii, USA, 4, page 417-420. (2007)
A. Batliner, C. Hacker, M. Kaiser, H. Mögele, and E. Nöth. Proceedings of AVSP'07: International Conference on Auditory-Visual Speech Processing, Kasteel Groenendaal, Hilvarenbeek, The Netherlands, (2007)