%0 Journal Article
%A Witold Bula
%T On continua having three types of open subsets
%J Colloquium Mathematicum
%D 1981
%P 221-225
%V 45
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm-45-2-221-225/
%R 10.4064/cm-45-2-221-225
%G en
%F 10_4064_cm_45_2_221_225