TY - JOUR TI - GMJ volume 33 issue 1 Cover and Front matter JO - Glasgow mathematical journal PY - 1991 SP - f1 EP - f8 VL - 33 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500007941/ DO - 10.1017/S0017089500007941 ID - 10_1017_S0017089500007941 ER -