%0 Journal Article
%T Problems for Solution
%J Canadian mathematical bulletin
%D 1964
%P 473-478
%V 7
%N 3
%U http://geodesic.mathdoc.fr/articles/10.1017/S000843950003188X/
%R 10.1017/S000843950003188X
%F 10_1017_S000843950003188X