Luiz Claudio Duarte Dalmolin Silvia Modesto Nassar Rogério Cid Bastos Gustavo Pereira Mateus A Concept Map Extractor Tool for Teaching and Learning. 18-20 2009 ICALT http://dx.doi.org/10.1109/ICALT.2009.210 conf/icalt/2009 db/conf/icalt/icalt2009.html#DalmolinNBM09