@inproceedings{VLDB-1988-KimC,
	author        = "Won Kim and Hong-Tai Chou",
	booktitle     = "{Proceedings of the 14th International Conference on Very Large Data Bases}",
	ee            = "http://www.vldb.org/conf/1988/P148.PDF",
	isbn          = "0-934613-75-3",
	pages         = "148--159",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Versions of Schema for Object-Oriented Databases}",
	year          = 1988,
}