%0 Journal Article %A S. Úwierczkowski %T A sufficient condition for independence %J Colloquium Mathematicum %D 1962 %P 39-42 %V 9 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-9-1-39-42/ %R 10.4064/cm-9-1-39-42 %G en %F 10_4064_cm_9_1_39_42