H. Seidel. Informatik 2009: Im Focus das Leben, Beiträge der 39. Jahrestagung der Gesellschaft für Informatik e.V. (GI), volume P-154 of GI Edition: Lecture Notes in Informatics (LNI) -- Proceedings, page 5--14. Bonn, Gesellschaft für Informatik, (2009)
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)
R. Engel. Proceedings of ICSLP---Interspeech 2002: 7th International Conference on Spoken Language Processing, Denver, CO, USA, page 2717--2720. (2002)