1. A complete calculus for possibilistic logic programming with fuzzy propositional variable;Alsinet,2000
2. Fril—Fuzzy and Evidential Reasoning in AI;Baldwin,1995
3. Vagueness: An exercise in logical analysis;Black;Philos. Sci.,1937
4. An introduction to possibility and fuzzy logics;Dubois,1988
5. Can we enforce full compositionality in uncertainty calculi?;Dubois,1994