V. S. Lakshmanan, Alberto O. Mendelzon. Inductive Pebble Games and the Expressive Power of Datalog. In Proceedings of the Eighth ACM SIGACT-SIGMOD-SIGART Symposium on Principles of Database Systems, March 29-31, 1989, Philadelphia, Pennsylvania. pages 301-310, ACM Press, 1989. [doi]
Abstract is missing.