@inproceedings{VLDB-1994-KilgerM,
	author        = "Christoph Kilger and Guido Moerkotte",
	booktitle     = "{Proceedings of the 20th International Conference on Very Large Data Bases}",
	ee            = "http://www.vldb.org/conf/1994/P180.PDF",
	isbn          = "1-55860-153-8",
	pages         = "180--191",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Indexing Multiple Sets}",
	year          = 1994,
}