W. Wolf. Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on, 2, page 1228-1231 vol. 2. (May 1996)
L. Zappella, X. Lladó, and J. Salvi. Proceedings of the 2008 Conference on Artificial Intelligence Research and Development: Proceedings of the 11th International Conference of the Catalan Association for Artificial Intelligence, page 398--407. Amsterdam, The Netherlands, The Netherlands, IOS Press, (2008)
P. Sundberg, T. Brox, M. Maire, P. Arbelaez, and J. Malik. Proceedings of the 2011 IEEE Conference on Computer Vision and Pattern Recognition, page 2233--2240. Washington, DC, USA, IEEE Computer Society, (2011)
T. Moeslund, A. Hilton, and V. Krüger. Computer Vision and Image Understanding, 104 (2–3):
90 - 126(2006)Special Issue on Modeling People: Vision-based understanding of a person’s shape, appearance, movement and behaviour.