Advances in Databases and Information Systems 8th East European Conference, ADBIS 2004, Budapest, Hungary, September 22-25, 2004, Proceedings - Gottlob, Georg; Gottlob, Georg; Benczur, Andras; Benczur, Andras; Demetrovics, Janos; Demetrovics, Janos (Springer Berlin Heidelberg : Imprint: Springer, 2004)