TY - JOUR TI - GMJ volume 62 issue 2 Cover and Back matter JO - Glasgow mathematical journal PY - 2020 SP - b1 EP - b2 VL - 62 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089520000105/ DO - 10.1017/S0017089520000105 ID - 10_1017_S0017089520000105 ER -