Calì, A., Gottlob, G., Lukasiewicz, T., Pieris, A., & Moor, O. (2010). Datalog+/-: A Family of Languages for Ontology Querying. Springer.
Lua i Stíl Chicago (17ú heag.)Calì, A., G. Gottlob, T. Lukasiewicz, A. Pieris, agus O. Moor. Datalog+/-: A Family of Languages for Ontology Querying. Springer, 2010.
Lua MLA (9ú heag.)Calì, A., et al. Datalog+/-: A Family of Languages for Ontology Querying. Springer, 2010.
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