%0 Journal Article %A Zbigniew Piotrowski %T On simultaneous Blumberg sets %J Colloquium Mathematicum %D 1981 %P 209-214 %V 45 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-45-2-209-214/ %R 10.4064/cm-45-2-209-214 %G en %F 10_4064_cm_45_2_209_214