@inproceedings {4961,
	title = {The Combined Approach to Ontology-Based Data Access},
	booktitle = {International Joint Conference on Artificial Intelligence (IJCAI)},
	year = {2011},
	doi = {10.5591/978-1-57735-516-8/IJCAI11-442},
	author = {Roman Kontchakov and Carsten Lutz and David Toman and Frank Wolter and Michael Zakharyaschev}
}
