Richard Gil Ana María Borges Leonardo Contreras Maria J. Martín-Bautista Improving Ontologies through Ontology Learning: a University Case. 558-563 2009 CSIE (4) http://doi.ieeecomputersociety.org/10.1109/CSIE.2009.957 conf/csie/2009 db/conf/csie/csie2009-4.html#GilBCM09