TY - JOUR AU - W.D. Burgess TI - The injective hull of S-sets, S a semilattice of groups. JO - Semigroup forum PY - 1981 SP - 241 EP - 246 VL - 23 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SF_1981__23_134516/ ID - SF_1981__23_134516 ER -