%0 Journal Article %T GMJ volume 63 issue 3 Cover and Back matter %J Glasgow mathematical journal %D 2021 %P b1-b2 %V 63 %N 3 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089521000264/ %R 10.1017/S0017089521000264 %F 10_1017_S0017089521000264