Database and Expert Systems Applications 10th International Conference, DEXA'99, Florence, Italy, August 30 - September 3, 1999, Proceedings - Bench-Capon, Trevor; Bench-Capon, Trevor; Soda, Giovanni; Soda, Giovanni; Tjoa, A Min; Tjoa, A Min (Springer Berlin Heidelberg : Imprint: Springer, 1999)