TY - JOUR AU - Gould, Victoria TI - Coperfect monoids JO - Glasgow mathematical journal PY - 1987 SP - 73 EP - 88 VL - 29 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500006686/ DO - 10.1017/S0017089500006686 ID - 10_1017_S0017089500006686 ER -