%0 Journal Article %A G.M.S. Gomes %T R-unipotent congruences on regular semigroups. %J Semigroup forum %D 1985 %P 265-280 %V 31 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1985__31_134753/ %F SF_1985__31_134753