The following publications are possibly variants of this publication:
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- A General Datalog-Based Framework for Tractable Query Answering over Ontologies (extended abstract)Andrea Calì, Georg Gottlob, Thomas Lukasiewicz. sebd 2009: 29-36
- What you Always Wanted to Know About Datalog (And Never Dared to Ask)Stefano Ceri, Georg Gottlob, Letizia Tanca. tkde, 1(1):146-166, 1989. [doi]
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