@inproceedings{SAC-2004-ZumpanoGTV,
	author        = "Ester Zumpano and Sergio Greco and Irina Trubitsyna and Pierangelo Veltri",
	booktitle     = "{Proceedings of the 19th Symposium on Applied Computing}",
	doi           = "10.1145/967900.968045",
	editor        = "Hisham Haddad and Andrea Omicini and Roger L. Wainwright and Lorie M. Liebrock",
	isbn          = "1-58113-812-1",
	pages         = "692--697",
	publisher     = "{ACM}",
	title         = "{On the semantics and expressive power of Datalog-like languages for NP search and optimization problems}",
	year          = 2004,
}