%0 Journal Article %A Yamada, Miyuki %A Tamura, Takayuki %T Note on finite commutative nil-semigroups %J Portugaliae mathematica %D 1969 %P 189-203 %V 28 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1969__28_4_115098/ %G en %F PORMA_1969__28_4_115098