%0 Journal Article %A Roman Sikorski %T Remarks on a problem of Banach %J Colloquium Mathematicum %D 1947 %P 285-288 %V 1 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-1-4-285-288/ %R 10.4064/cm-1-4-285-288 %G de %F 10_4064_cm_1_4_285_288