Anne Dourgnon-Hanoune Patrick Salaün Christophe Roche Ontology for Long-Term Knowledge. 583-589 2006 conf/ieaaie/2006 IEA/AIE http://dx.doi.org/10.1007/11779568_63 db/conf/ieaaie/ieaaie2006.html#Dourgnon-HanouneSR06