@article{VLDB-2010-CaliGP,
	author        = "Andrea Calì and Georg Gottlob and Andreas Pieris",
	ee            = "http://www.comp.nus.edu.sg/~vldb2010/proceedings/files/papers/R49.pdf",
	journal       = "{Proceedings of the VLDB Endowment}",
	number        = 1,
	pages         = "554--565",
	title         = "{Advanced Processing for Ontological Queries}",
	volume        = 3,
	year          = 2010,
}