%0 Journal Article
%T The Congress
%J Canadian mathematical bulletin
%D 1965
%P 159-192
%V 8
%N 1
%U http://geodesic.mathdoc.fr/articles/10.1017/S0008439500024620/
%R 10.1017/S0008439500024620
%F 10_1017_S0008439500024620