%0 Journal Article %A Šešelja Branimir %A Vojvodić Gradimir %T Fuzzy sets on S as closure operations on P(S) %J Novi Sad Journal of Mathematics %D 1984 %P 117-127 %V 14 %I mathdoc %U http://geodesic.mathdoc.fr/item/NSJOM_1984__14__a32/ %F NSJOM_1984__14__a32