Bernard Lefebvre Gilles Gauthier Serge Tadié Guepfu Tran Huu Duc Hicham Achaba Competence Ontology for Domain Knowledge Dissemination and Retrieval. 845-859 2005 19 Applied Artificial Intelligence 9-10 http://dx.doi.org/10.1080/08839510500234222 db/journals/aai/aai19.html#LefebvreGTDA05