%0 Journal Article %A J. LipiƄski %T On a kind of dispersion of sets %J Colloquium Mathematicum %D 1964 %P 249-251 %V 12 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-12-2-249-251/ %R 10.4064/cm-12-2-249-251 %G en %F 10_4064_cm_12_2_249_251