%0 Journal Article %A M.G. Mogilevskii %T Order relations on symmetric semigroups of transformations and on their homomorphic images. %J Semigroup forum %D 1980 %P 283-306 %V 19 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1980__19_134389/ %F SF_1980__19_134389