%0 Journal Article %A Kmeť, František %T Radicals and their left ideal analogues in a semigroup %J Mathematica slovaca %D 1988 %P 139-145 %V 38 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1988__38_2_a5/ %G en %F MASLO_1988__38_2_a5