%0 Journal Article %A Witold Bula %T On compact Hausdorff spaces having finitely many types of open subsets %J Colloquium Mathematicum %D 1979 %P 211-214 %V 41 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-41-2-211-214/ %R 10.4064/cm-41-2-211-214 %G en %F 10_4064_cm_41_2_211_214