@inproceedings{VLDB-1992-KemperMS,
	author        = "Alfons Kemper and Guido Moerkotte and Michael Steinbrunn",
	booktitle     = "{Proceedings of the 18th International Conference on Very Large Data Bases}",
	ee            = "http://www.vldb.org/conf/1992/P079.PDF",
	isbn          = "1-55860-151-1",
	pages         = "79--90",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Optimizing Boolean Expressions in Object-Bases}",
	year          = 1992,
}