TY - JOUR TI - GMJ volume 55 issue A Cover and Front matter JO - Glasgow mathematical journal PY - 2013 SP - f1 EP - f7 VL - 55 IS - A UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089513000451/ DO - 10.1017/S0017089513000451 ID - 10_1017_S0017089513000451 ER -