APA (7th ed.) Citation

Orsi, G., & Pieris, A. (2011). Optimizing Query Answering under Ontological Constraints.

Chicago Style (17th ed.) Citation

Orsi, G., and A. Pieris. Optimizing Query Answering Under Ontological Constraints. 2011.

MLA (9th ed.) Citation

Orsi, G., and A. Pieris. Optimizing Query Answering Under Ontological Constraints. 2011.

Warning: These citations may not always be 100% accurate.