@inproceedings{STOC-1979-BeeriMSU,
	author        = "Catriel Beeri and Alberto O. Mendelzon and Yehoshua Sagiv and Jeffrey D. Ullman",
	booktitle     = "{Proceedings of the 11th Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/800135.804424",
	pages         = "319--329",
	publisher     = "{ACM}",
	title         = "{Equivalence of Relational Database Schemes}",
	year          = 1979,
}