TY - JOUR AU - T. Nordahl TI - Lattice representation in exchange transfusion. JO - Semigroup forum PY - 1981 SP - 275 EP - 275 VL - 23 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SF_1981__23_134520/ ID - SF_1981__23_134520 ER -