%0 Journal Article %A Čuda, Karel %T On the adjunction of any semiset to the system of $Sd_V$-classes in AST %J Commentationes Mathematicae Universitatis Carolinae %D 1989 %P 775-778 %V 30 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1989__30_4_a19/ %G en %F CMUC_1989__30_4_a19