%0 Journal Article %A E.E. Devun %T The equivalence of uniquely divisible semigroups and uniquely representable semigroups on the two-cell. %J Semigroup forum %D 1972 %P 69-72 %V 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1972__4_133878/ %F SF_1972__4_133878