@Article{DKP03,
author={Sébastien  Konieczny and Didier  Dubois and Henri  Prade},
title= {Quasi-possibilistic logic and its measures of information and conflict},
journal = {Fundamenta Informaticae},
volume = {57}, 
number = {2-4},
pages = {101-125},
year= {2003}
}