%0 Journal Article %A A. Wallace %T A note on convexity %J Colloquium Mathematicum %D 1961 %P 237-238 %V 8 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-8-2-237-238/ %R 10.4064/cm-8-2-237-238 %G en %F 10_4064_cm_8_2_237_238