Rokia Bendaoud Amedeo Napoli Yannick Toussaint Formal Concept Analysis: A Unified Framework for Building and Refining Ontologies. 156-171 2008 EKAW http://dx.doi.org/10.1007/978-3-540-87696-0_16 conf/ekaw/2008 db/conf/ekaw/ekaw2008.html#BendaoudNT08