%0 Journal Article
%T GMJ volume 61 issue 3 Cover and Front matter
%J Glasgow mathematical journal
%D 2019
%P f1-f2
%V 61
%N 3
%U http://geodesic.mathdoc.fr/articles/10.1017/S0017089519000326/
%R 10.1017/S0017089519000326
%F 10_1017_S0017089519000326