Beatriz Barros Felisa Verdejo Timothy Read Riichiro Mizoguchi Applications of a Collaborative Learning Ontology. 301-310 2002 conf/micai/2002 MICAI http://link.springer.de/link/service/series/0558/bibs/2313/23130301.htm db/conf/micai/micai2002.html#BarrosVRM02