@inproceedings{VLDB-1990-WangM,
	author        = "Y. Richard Wang and Stuart E. Madnick",
	booktitle     = "{Proceedings of the 16th International Conference on Very Large Data Bases}",
	ee            = "http://www.vldb.org/conf/1990/P519.PDF",
	isbn          = "1-55860-149-X",
	pages         = "519--538",
	publisher     = "{Morgan Kaufmann}",
	title         = "{A Polygen Model for Heterogeneous Database Systems: The Source Tagging Perspective}",
	year          = 1990,
}