%0 Journal Article %A P. H. Doyle %T On monotone unions of closed n-cells %J Colloquium Mathematicum %D 1971 %P 65-68 %V 23 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-23-1-65-68/ %R 10.4064/cm-23-1-65-68 %G en %F 10_4064_cm_23_1_65_68