Calì, A., Gottlob, G., Lukasiewicz, T., Pieris, A., & Moor, O. (2010). Datalog+/-: A Family of Languages for Ontology Querying. Springer.

Calì, A., G. Gottlob, T. Lukasiewicz, A. Pieris, and O. Moor. Datalog+/-: A Family of Languages for Ontology Querying. Springer, 2010.

Calì, A., et al. Datalog+/-: A Family of Languages for Ontology Querying. Springer, 2010.