Matthias Jarke Janis A. Bubenko Jr. Keith G. Jeffery Advances in Database Technology - EDBT'94. 4th International Conference on Extending Database Technology, Cambridge, United Kingdom, March 28-31, 1994, Proceedings EDBT Lecture Notes in Computer Science 779 Springer 1994 3-540-57818-8 db/conf/edbt/edbt94.html