A New Representation Theorem for Contranegative Deontic Logic.

Sven Ove Hansson A New Representation Theorem for Contranegative Deontic Logic. 1-7 2004 77 Studia Logica 1 http://dx.doi.org/10.1023/B:STUD.0000034182.95695.cb db/journals/sLogica/sLogica77.html#Hanson04