M. Ortiz de la Fuente:
"Complexity of Query Answering over Expressive Knowledge Bases";
Talk: MICAI 2008: 7th Mexican International Conference on Artificial Intelligence, Mexico; 2008-10-27 - 2008-10-31; in: "Proceedings of MICAI-2008, Doctoral Consortium", M. Montes y Gomez, M. Gonzalez Mendoza (ed.); (2008), 22 - 25.