Gerald Quirchmayr Erich Schweighofer Trevor J. M. Bench-Capon Database and Expert Systems Applications, 9th International Conference, DEXA '98, Vienna, Austria, August 24-28, 1998, Proceedings DEXA Lecture Notes in Computer Science 1460 Springer 1998 3-540-64950-6 db/conf/dexa/dexa98.html