@inproceedings{PODS-1993-LevyMSS,
	author        = "Alon Y. Levy and Inderpal Singh Mumick and Yehoshua Sagiv and Oded Shmueli",
	booktitle     = "{Proceedings of the 12th Symposium on Principles of Database Systems}",
	cdrom         = "['journals/anthology/cd1-3:PODS93/P109.PDF', 'journals/anthology/dvd1:text/1-3/PODS93/P109.PDF']",
	doi           = "10.1145/153850.153860",
	isbn          = "0-89791-593-3",
	pages         = "109--122",
	publisher     = "{ACM Press}",
	title         = "{Equivalence, Query-Reachability, and Satisfiability in Datalog Extensions}",
	year          = 1993,
}