Jean-François Baget Madalina Croitoru Jérôme Fortin Rallou Thomopoulos Default Conceptual Graph Rules: Preliminary Results for an Agronomy Application. 86-99 2009 ICCS http://dx.doi.org/10.1007/978-3-642-03079-6_7 conf/iccs/2009 db/conf/iccs/iccs2009.html#BagetCFT09