%0 Journal Article
%A J. Oxtoby
%T The kernel operation on subsets of a $T_1$-space
%J Fundamenta Mathematicae
%D 1975
%P 275-284
%V 90
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/fm-90-3-275-284/
%R 10.4064/fm-90-3-275-284
%G en
%F 10_4064_fm_90_3_275_284