Database and Expert Systems Applications 12th International Conference, DEXA 2001 Munich, Germany, September 3-5, 2001 Proceedings - Mayr, Heinrich C.; Mayr, Heinrich C.; Lazansky, Jiri; Lazansky, Jiri; Quirchmayr, Gerald; Quirchmayr, Gerald; Vogel, Pavel; Vogel, Pavel (Springer Berlin Heidelberg : Imprint: Springer, 2001)