The following publications are possibly variants of this publication:
- A General Datalog-Based Framework for Tractable Query Answering over Ontologies (extended abstract)Andrea Calì, Georg Gottlob, Thomas Lukasiewicz. sebd 2009: 29-36
- A general Datalog-based framework for tractable query answering over ontologiesAndrea Calì, Georg Gottlob, Thomas Lukasiewicz. ws, 14:57-83, 2012. [doi]
- Datalog Extensions for Tractable Query Answering over OntologiesAndrea Calì, Georg Gottlob, Thomas Lukasiewicz. In Roberto De Virgilio, Fausto Giunchiglia, Letizia Tanca, editors, Semantic Web Information Management - A Model-Based Perspective. pages 249-279, Springer, 2009. [doi]
- Tractable Query Answering over Ontologies with Datalog+/-Andrea Calì, Georg Gottlob, Thomas Lukasiewicz. dlog 2009: [doi]
- Conjunctive Query Answering in Probabilistic Datalog+/- OntologiesGeorg Gottlob, Thomas Lukasiewicz, Gerardo I. Simari. rr 2011: 77-92 [doi]