%0 Journal Article
%A Harris, Douglas
%T Extension Closed and Cluster Closed Subspaces
%J Canadian journal of mathematics
%D 1972
%P 1132-1136
%V 24
%N 6
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-119-8/
%R 10.4153/CJM-1972-119-8
%F 10_4153_CJM_1972_119_8