Chekol, M. W., J. Euzenat, P. Genevès, and N. Layaïda. “SPARQL Query Containment Under SHI Axioms”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 26, no. 1, Sept. 2021, pp. 10-16, doi:10.1609/aaai.v26i1.8108.