@article{CMUC_1999_40_2_a16,
     author = {Keremedis, Kyriakos and Tachtsis, Eleftherios},
     title = {On the extensibility of closed filters in {T}$_1$ spaces and the existence of well orderable filter bases},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {343--353},
     year = {1999},
     volume = {40},
     number = {2},
     mrnumber = {1732656},
     zbl = {0977.03025},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1999_40_2_a16/}
}