%0 Journal Article %T GMJ volume 31 issue 2 Cover and Front matter %J Glasgow mathematical journal %D 1989 %P f1-f2 %V 31 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S001708950000762X/ %R 10.1017/S001708950000762X %F 10_1017_S001708950000762X