@inproceedings{VLDB-1990-Esculier,
	author        = "Christian Esculier",
	booktitle     = "{Proceedings of the 16th International Conference on Very Large Data Bases}",
	ee            = "http://www.vldb.org/conf/1990/P638.PDF",
	isbn          = "1-55860-149-X",
	pages         = "638--649",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Non-Monotonic Knowledge Evolution in VLKDBs}",
	year          = 1990,
}