@inproceedings{VLDB-1980-Demolombe,
	author        = "Robert Demolombe",
	booktitle     = "{Proceedings of the Sixth International Conference on Very Large Data Bases}",
	cdrom         = "VLDB80/P055.PDF",
	pages         = "55--63",
	publisher     = "{IEEE Computer Society}",
	title         = "{Estimation of the Number of Tuples Satisfying a Query Expressed in Predicate Calculus Language}",
	year          = 1980,
}