1. Linking data to ontologies;Poggi;Data Semant.,2008
2. The DL-lite family and relations;Artale;J. Artif. Intell.,2009
3. A. Calì, G. Gottlob, T. Lukasiewicz, Datalog±: A Unified Approach to Ontologies and Integrity Constraints, in: Proc. of the International Conference on Database Theory, ICDT, 2009, pp. 14–30.
4. Towards more expressive ontology languages: The query answering problem;Calì;Artificial Intelligence,2012
5. A general datalog-based framework for tractable query answering over ontologies;Calì;Web Semant.,2012