TY - JOUR AU - S. Premchand TI - ndependence of axioms for biordered sets. JO - Semigroup forum PY - 1984 SP - 249 EP - 264 VL - 28 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SF_1984__28_134653/ ID - SF_1984__28_134653 ER -