@inproceedings{SAC-2005-Behrend,
	author        = "Andreas Behrend",
	booktitle     = "{Proceedings of the 20th Symposium on Applied Computing}",
	doi           = "10.1145/1066677.1066821",
	editor        = "Hisham Haddad and Lorie M. Liebrock and Andrea Omicini and Roger L. Wainwright",
	isbn          = "1-58113-964-0",
	pages         = "623--628",
	publisher     = "{ACM}",
	title         = "{Optimizing existential queries in stratifiable deductive databases}",
	year          = 2005,
}