%0 Journal Article %A Roman Sikorski %T Closure homomorphisms and interior mappings %J Fundamenta Mathematicae %D 1955 %P 12-20 %V 41 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-41-1-12-20/ %R 10.4064/fm-41-1-12-20 %G en %F 10_4064_fm_41_1_12_20