TY - JOUR AU - K. Denecke AU - J. Koppitz TI - Hyperassociative varieties of semigroups. JO - Semigroup forum PY - 1994 SP - 41 EP - 48 VL - 49 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SF_1994__49_2_135332/ ID - SF_1994__49_2_135332 ER -