Marcelo Arenas, Pablo Barceló, Ronald Fagin, Leonid Libkin. Locally Consistent Transformations and Query Answering in Data Exchange. In Alin Deutsch, editor, Proceedings of the Twenty-third ACM SIGACT-SIGMOD-SIGART Symposium on Principles of Database Systems, June 14-16, 2004, Paris, France. pages 229-240, ACM, 2004. [doi]
Abstract is missing.