%0 Journal Article %A Edward Marczewski %A T. Traczyk %T On developable sets and almost-limit points %J Colloquium Mathematicum %D 1961 %P 55-66 %V 8 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-8-1-55-66/ %R 10.4064/cm-8-1-55-66 %G en %F 10_4064_cm_8_1_55_66