%0 Journal Article %A Roman Sikorski %T On an unsolved problem from the theory of Boolean algebras %J Colloquium Mathematicum %D 1949 %P 27-29 %V 2 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-2-1-27-29/ %R 10.4064/cm-2-1-27-29 %G en %F 10_4064_cm_2_1_27_29