@inproceedings{VLDB-2004-RossS,
	author        = "Kenneth A. Ross and Julia Stoyanovich",
	booktitle     = "{Proceedings of the 30th International Conference on Very Large Data Bases}",
	ee            = "http://www.vldb.org/conf/2004/RS23P2.PDF",
	isbn          = "0-12-088469-0",
	pages         = "912--923",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Symmetric Relations and Cardinality-Bounded Multisets in Database Systems}",
	year          = 2004,
}