%0 Journal Article %A Keremedis, Kyriakos %A Tachtsis, Eleftherios %T On the extensibility of closed filters in T$_1$ spaces and the existence of well orderable filter bases %J Commentationes Mathematicae Universitatis Carolinae %D 1999 %P 343-353 %V 40 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1999__40_2_a16/ %G en %F CMUC_1999__40_2_a16