%0 Journal Article %A K. Urbanik %T A proof of a theorem of Żelazko on $L^p$-algebras %J Colloquium Mathematicum %D 1961 %P 121-123 %V 8 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-8-1-121-123/ %R 10.4064/cm-8-1-121-123 %G de %F 10_4064_cm_8_1_121_123