@inproceedings{KR-2000-LiberatoreS,
	author        = "Paolo Liberatore and Marco Schaerf",
	booktitle     = "{Proceedings of the Seventh International Conference on Principles of Knowledge Representation and Reasoning}",
	pages         = "145--152",
	publisher     = "{Morgan Kaufmann}",
	title         = "{BReLS: A System for the Integration of Knowledge Bases}",
	year          = 2000,
}