TY - JOUR AU - D.J. Hansen TI - Bistable orderings on a certain class of semigroups. JO - Semigroup forum PY - 1986 SP - 265 EP - 268 VL - 33 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SF_1986__33_134810/ ID - SF_1986__33_134810 ER -