%0 Journal Article %A Kramosil, Ivan %T Possible-worlds semantics for rule-based expert systems with set-valued weights %J Kybernetika %D 1989 %P 65-71 %V 25 %N Suppl %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1989__25_Suppl_a9/ %G en %F KYB_1989__25_Suppl_a9