@inproceedings {4975,
	title = {Conjunctive Query Answering in EL Using a Database System},
	booktitle = {W3C Web Ontology Language (OWL) Experiences and Directions Workshop (OWLED)},
	year = {2008},
	url = {http://ceur-ws.org/Vol-432/owled2008eu_submission_2.pdf},
	author = {Carsten Lutz and David Toman and Frank Wolter}
}
