%0 Journal Article
%T Thomas Murray MacRobert
%J Glasgow mathematical journal
%D 1963
%P 57-64
%V 6
%N 2
%U http://geodesic.mathdoc.fr/articles/10.1017/S2040618500034742/
%R 10.1017/S2040618500034742
%F 10_1017_S2040618500034742