@inproceedings{PODS-2012-LetelierPPS,
	author        = "Andrés Letelier and Jorge Pérez and Reinhard Pichler and Sebastian Skritek",
	booktitle     = "{Proceedings of the 31st Symposium on Principles of Database Systems}",
	doi           = "10.1145/2213556.2213572",
	isbn          = "978-1-4503-1248-6",
	pages         = "89--100",
	publisher     = "{ACM}",
	title         = "{Static analysis and optimization of semantic web queries}",
	year          = 2012,
}