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)
D. Kuettel, M. Breitenstein, L. Van Gool, and V. Ferrari. Proceedings of CVPR'10: IEEE Conference on Computer Vision and Pattern Recognition, San Francisco, CA, USA, page 1951-1958. (2010)
T. Fujita, K. Masaki, F. Suzuki, and K. Maenaka. CME 2007: IEEE/ICME International Conference on Complex Medical Engineering, Beijing, China, page 416-420. (2007)