@inproceedings{PODS-2015-AlvianoP,
	author        = "Mario Alviano and Andreas Pieris",
	booktitle     = "{Proceedings of the 34th Symposium on Principles of Database Systems}",
	doi           = "10.1145/2745754.2745758",
	isbn          = "978-1-4503-2757-2",
	pages         = "79--90",
	publisher     = "{ACM}",
	title         = "{Default Negation for Non-Guarded Existential Rules}",
	year          = 2015,
}