Modular Knowledge Representation and Reasoning in the Semantic Web (pdf)
Seminar in Vienna University of Technology, June 2011.
Query answering in the Description Logic Horn-SHIQ. (pdf)
European Master in Computational Logic 2011 Student Workshop, Lisbon, Portugal, February 2011. (http://centria.di.fct.unl.pt/events/emcl11/programme.html)
DATALOG extensions for tractable query answering over ontologies. (pdf)
Seminar in Vienna University of Technology, January 2011.
Similarity between ontologies regarding subsumption relations. (pdf)
Seminar in Dresden University of Technology, September 2010.