Advances in Artificial Intelligence -- IBERAMIA 2004 9th Ibero-American Conference on AI, Puebla, Mexico, November 22-26, 2004, Proceedings - Lemaitre, Christian; Lemaitre, Christian; Reyes, Carlos A.; Reyes, Carlos A.; Gonzalez, Jesus A.; Gonzalez, Jesus A. (Springer Berlin Heidelberg : Imprint: Springer, 2004)