%0 Journal Article
%A Halter-Koch, Franz
%T Letter to the Editor
%J Canadian mathematical bulletin
%D 1973
%P 299-299
%V 16
%N 3
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1973-050-x/
%R 10.4153/CMB-1973-050-x
%F 10_4153_CMB_1973_050_x