Pilar Dellunde Lluis Godo Enrico Marchioni Exploring Extensions of Possibilistic Logic over Gödel Logic. 923-934 2009 ECSQARU http://dx.doi.org/10.1007/978-3-642-02906-6_79 conf/ecsqaru/2009 db/conf/ecsqaru/ecsqaru2009.html#DellundeGM09