Anand Rajaraman, Jeffrey D. Ullman. Integrating Information by Outerjoins and Full Disjunctions. In Proceedings of the Fifteenth ACM SIGACT-SIGMOD-SIGART Symposium on Principles of Database Systems, June 3-5, 1996, Montreal, Canada. pages 238-248, ACM Press, 1996. [doi]
Abstract is missing.