Database and Expert Systems Applications 9th International Conference, DEXA'98, Vienna, Austria, August 24-28, 1998, Proceedings - Quirchmayr, Gerald; Quirchmayr, Gerald; Schweighofer, Erich; Schweighofer, Erich; Bench-Capon, Trevor J.M; Bench-Capon, Trevor J.M (Springer Berlin Heidelberg : Imprint: Springer, 1998)