%0 Journal Article %A Niovi Kehayopulu %A Michael Tsingelis %T The Ideal extensions of ordered semigroups %J Ευκλείδης Γ %D 1993 %P 89-93 %V 38 %I mathdoc %U http://geodesic.mathdoc.fr/item/EUG_1993__38_a17/ %G gr %F EUG_1993__38_a17