Learning Subsumption Hierarchies of Ontology Concepts from Texts. Web Intelligence and Agent Systems: An International Journal, IOS Press. 8. 2010.
Determining Automatically the Size of Learned Ontologies (short paper). European Conference on Artificial Intelligence (ECAI 2008).. 2008.
Learning Ontologies of Appropriate Size. Artificial Intelligence: Theory, Methods and Applications (5th Hellenic Conference on Artificial Intelligence, SETN 2008).. 2008.
Discovering Subsumption Hierarchies of Ontology Concepts from Text Corpora. IEEE/WIC/ACM International Conference on Web Intelligence.. 2007.