Alberto Sanfeliu, José Francisco Martínez Trinidad, Jesús Ariel Carrasco-Ochoa: Progress in Pattern Recognition, Image Analysis and Applications, 9th Iberoamerican Congress on Pattern Recognition, CIARP 2004, Puebla, Mexico, October 26-29, 2004, Proceedings. Lecture Notes in Computer Science 3287, Springer 2004, ISBN 3-540-23527-2