@inproceedings{PODS-2014-ArenasGP,
	author        = "Marcelo Arenas and Georg Gottlob and Andreas Pieris",
	booktitle     = "{Proceedings of the 33rd Symposium on Principles of Database Systems}",
	doi           = "10.1145/2594538.2594555",
	isbn          = "978-1-4503-2375-8",
	pages         = "14--26",
	publisher     = "{ACM}",
	title         = "{Expressive languages for querying the semantic web}",
	year          = 2014,
}