Jürg Kohlas Dritan Berzati Rolf Haenni Probabilistic Argumentation Systems and Abduction. 177-195 2002 34 Ann. Math. Artif. Intell. 1-3 db/journals/amai/amai34.html#KohlasBH02 http://dx.doi.org/10.1023/A:1014482025714