%0 Journal Article %A Drbohlav, Karel %T On finitely generated commutative semigroups %J Commentationes Mathematicae Universitatis Carolinae %D 1963 %P 87-92 %V 4 %N 3 %U http://geodesic.mathdoc.fr/item/CMUC_1963_4_3_a0/ %G en %F CMUC_1963_4_3_a0