%0 Journal Article %A C. S. Hoo %A K. P. Shum %T On the nilpotent elements of semigroups %J Colloquium Mathematicum %D 1972 %P 211-224 %V 25 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-25-2-211-224/ %R 10.4064/cm-25-2-211-224 %G en %F 10_4064_cm_25_2_211_224