Show 10 5 10 15 20 50 100 250 Sort by year (new to old) Actions Download search results Subscribe to news feed Your filters: cql: keyword exact "first-order" Add to list Conference Paper C1 The Manchester twins : conflicts between directed obligations Stef Frijters and Thijs De Coninck (2021) Deontic logic and normative systems : 15th international conference, DEON 2020/2021. p.166-182 Add to list Conference Paper P1 open access Non-truth-functional fibred semantics Carlos Caleiro and João Marcos de Almeida (2001) IC-AI'2001 : PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ARTIFICIAL INTELLIGENCE, VOLS I-III. 2. p.841-847