@article{10_4064_fm_57_1_97_106,
     author = {J. Hintikka},
     title = {A closure and complement result for nested topologies},
     journal = {Fundamenta Mathematicae},
     pages = {97--106},
     publisher = {mathdoc},
     volume = {57},
     number = {1},
     year = {1965},
     doi = {10.4064/fm-57-1-97-106},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-57-1-97-106/}
}