Daniele Nardi Riccardo Rosati Generalized Default Logic: Minimal Knowledge, Autoepistemic and Default Reasoning Reconciled. 1-12 http://link.springer.de/link/service/series/0558/bibs/1792/17920001.htm 1999 conf/aiia/1999 AI*IA db/conf/aiia/aiia1999.html#NardiR99