@inproceedings{VLDB-1977-BancilhonS,
	author        = "François Bancilhon and Nicolas Spyratos",
	booktitle     = "{Proceedings of the Third International Conference on Very Large Data Bases}",
	cdrom         = "VLDB77/P494.PDF",
	pages         = "494--500",
	publisher     = "{IEEE Computer Society}",
	title         = "{Protection of Information in Relational Data Bases}",
	year          = 1977,
}