%0 Journal Article %A B. Anderson %T A class of topologies with $T_1$-complements %J Fundamenta Mathematicae %D 1970 %P 267-277 %V 69 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-69-3-267-277/ %R 10.4064/fm-69-3-267-277 %G en %F 10_4064_fm_69_3_267_277