%0 Journal Article %A Zbigniew Gajda %A Andrzej Smajdor %A Wilhelmina Smajdor %T A theorem of the Hahn-Banach type and its applications %J Annales Polonici Mathematici %D 1992 %P 243-252 %V 57 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-57-3-243-252/ %R 10.4064/ap-57-3-243-252 %G en %F 10_4064_ap_57_3_243_252