%0 Journal Article %A B. Florkiewicz %A A. Rybarski %T A certain modification of Hardy's inequality %J Colloquium Mathematicum %D 1972 %P 345-348 %V 26 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-26-1-345-348/ %R 10.4064/cm-26-1-345-348 %G en %F 10_4064_cm_26_1_345_348