%0 Journal Article
%A Ostasiewicz, Walenty
%T Half a century of fuzzy sets
%J Kybernetika
%D 1992
%P 17-20
%V 28
%N Suppl
%I mathdoc
%U http://geodesic.mathdoc.fr/item/KYB_1992__28_Suppl_a2/
%G en
%F KYB_1992__28_Suppl_a2