TY - JOUR AU - G.M.S. Gomes TI - The lattice of R-unipotent congruences on a regular semigroup. JO - Semigroup forum PY - 1986 SP - 159 EP - 174 VL - 33 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SF_1986__33_134801/ ID - SF_1986__33_134801 ER -