Fábio Natanael Kepler Christian Paz-Trillo Joselyto Riani Márcio Moretto Ribeiro Karina Valdivia Delgado Leliane Nunes de Barros Renata Wassermann Classifying Ontologies. 2006 WONTO http://ceur-ws.org/Vol-199/wonto-01.pdf conf/wonto/2006 db/conf/wonto/wonto2006.html#KeplerPRRDBW06