%0 Journal Article %A Krzysztof NowiƄski %T Extension of closed mappings %J Fundamenta Mathematicae %D 1974 %P 9-17 %V 85 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-85-1-9-17/ %R 10.4064/fm-85-1-9-17 %G en %F 10_4064_fm_85_1_9_17