%0 Journal Article %A MlĨek, Josef %T $\in $-representation and set-prolongations %J Commentationes Mathematicae Universitatis Carolinae %D 1992 %P 661-666 %V 33 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1992__33_4_a10/ %G en %F CMUC_1992__33_4_a10