Nuria Casellas Aleks Jakulin Joan-Josep Vallbé Pompeu Casanovas Acquiring an Ontology from the Text. 1000-1013 2006 conf/ieaaie/2006 IEA/AIE http://dx.doi.org/10.1007/11779568_107 db/conf/ieaaie/ieaaie2006.html#CasellasJVC06