Timos K. Sellis, Chih-Chen Lin. A Geometric Approach to Indexing Large Rule Bases. In Alain Pirotte, Claude Delobel, Georg Gottlob, editors, Advances in Database Technology - EDBT 92, 3rd International Conference on Extending Database Technology, Vienna, Austria, March 23-27, 1992, Proceedings. Volume 580 of Lecture Notes in Computer Science, pages 405-420, Springer, 1992. [doi]