%0 Journal Article
%T Announcement
%J Canadian mathematical bulletin
%D 1968
%P 525-525
%V 11
%N 3
%U http://geodesic.mathdoc.fr/articles/10.1017/S0008439500029829/
%R 10.1017/S0008439500029829
%F 10_1017_S0008439500029829