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Al-Tawil, M. and Dimitrova, V. and Thakker, D. and Poulovassilis, Alexandra (2017) Evaluating knowledge anchors in data graphs against Basic Level Objects. In: Cabot, J. and de Virgilio, R. and Torlone, R. (eds.) Web Engineering: 17th International Conference, ICWE 2017, Rome, Italy, June 5-8, 2017, Proceedings. Lecture Notes in Computer Science 10360. Rome, Italy: Springer. ISBN 9783319601311.
Calì, Andrea and Gottlob, G. and Lukasiewicz, T. (2009) Datalog extensions for tractable query answering over ontologies. In: de Virgilio, R. and Giunchiglia, F. and Tanca, L. (eds.) Semantic Web Information Management. Berlin, Germany: Springer, pp. 249-279. ISBN 9783642043284.