Philippe Smets Belief Functions: The Disjunctive Rule of Combination and the Generalized Bayesian Theorem. 633-664 2008 Classic Works of the Dempster-Shafer Theory of Belief Functions http://dx.doi.org/10.1007/978-3-540-44792-4_25 series/sfsc/2008-219 db/series/sfsc/sfsc219.html#Smets08