G. Mori, S. Belongie, and J. Malik. Computer Vision and Pattern Recognition, 2001. CVPR 2001. Proceedings
of the 2001 IEEE Computer Society Conf. on, 1, page I----723----I----730 vol.1. (2001)
N. Jojic, and B. Frey. Computer Vision and Pattern Recognition, 2001. CVPR 2001. Proceedings
of the 2001 IEEE Computer Society Conf. on, 1, page I--199 -- I--206 vol.1. (2001)