In: Jean-François Boulicaut; Floriana Esposito; Fosca Giannotti; Dino Pedreschi (Hrsg.). Knowledge Discovery in Databases: PKDD 2004, 8th European Conference on Principles and Practice of Knowledge Discovery in Databases, Proceedings. European Conference on Knowledge Discovery in Databases (PKDD-2004), September 20-24, Pisa, Italy, Pages 549-551, Lecture Notes in Computer Science (LNCS), Vol. 3202, Springer, 2004.