Jepson, A. D., Fleet, D. J.,US Pat. 6,954,544, October 2005 (patent)
IEEE Conf. on Computer Vision and Pattern Recognition (CVPR), Video Proceedings,, pages: 1202, 2005 (patent)
Yacoob, Y., Davis, L. S.,In Computer Vision for Human–Machine Interaction, , Gavrila, D., Horprasert, T., Morimoto, C. (Editors: R. Cipolla and A. Pentland), Cambridge University Press, 1998 (incollection)
US Pat. 5,802,220, December 1995 (patent) , Yacoob, Y.
US Pat. 5,774,591, December 1995 (patent) , Yacoob, Y.
US Pat. 5,802,203, June 1995 (patent) , Jepson, A. D.