Possibilistic Logic, Preferential Models, Non-monotonicity and Related Issues
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\begin{bibtex} @inproceedings{DBLP:conf/ijcai/DuboisP91, title={Possibilistic Logic, Preferential Models, Non-monotonicity and Related Issues}, pages={419-425}, year={1991}, booktitle={IJCAI}, url={http://www.informatik.uni-trier.de/~ley/db/conf/ijcai/ijcai91.html#DuboisP91}, author={Didier Dubois and Henri Prade} }\end{bibtex}
