%0 Journal Article %A S. Subbiah %A K.D. jr. Magill %T Another semigroup characterization of the simple closed curve. %J Semigroup forum %D 1980 %P 89-90 %V 20 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1980__20_134405/ %F SF_1980__20_134405