%0 Journal Article %A Luh, Jiang %T On the concepts of radical of semigroup having Kernel %J Portugaliae mathematica %D 1960 %P 189-198 %V 19 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1960__19_3_114839/ %G en %F PORMA_1960__19_3_114839