M. Sipper, Y. Azaria, A. Hauptman, and Y. Shichel. IEEE Transactions on Systems, Man and Cybernetics,
Part C: Applications and Reviews, 37 (4):
583--593(July 2007)
R. Jesus, D. Goncalves, A. Abrantes, and N. Correia. Computer Vision and Pattern Recognition Workshops, 2008. CVPR Workshops 2008. IEEE Computer Society Conference on, (June 2008)