@article{MM2_1973__11_154212,
     author = {Marcel Ern\'e},
     title = {Struktur- und {Anzahlformeln} f\"ur {Topologien} auf endlichen {Mengen.}},
     journal = {Manuscripta mathematica},
     pages = {221--260},
     publisher = {mathdoc},
     volume = {11},
     year = {1973},
     zbl = {0269.54001},
     url = {http://geodesic.mathdoc.fr/item/MM2_1973__11_154212/}
}