W. Zhang, B. Yu, G. Zelinsky, and D. Samaras. Proceedings of the 2005 IEEE Computer Society Conference on Computer
Vision and Pattern Recognition (CVPR'05)-Volume 2-Volume 02, (2005)
Y. Wu, and T. Huang. Gesture-Based Communication in Human-Computer Interaction: International
Gesture Workshop, GW'99, Proceedings, page 103--. Gif-sur-Yvette, France, (March 1999)