%0 Journal Article %T Instructional Conference on Differential Equations %J Canadian mathematical bulletin %D 1967 %P 169-169 %V 10 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S0008439500027934/ %R 10.1017/S0008439500027934 %F 10_1017_S0008439500027934