@article{ARM_1989__25_1-2_a10,
     author = {Herrlich, Horst},
     title = {Realizations of topologies and closure operators by set systems and by neighbourhoods},
     journal = {Archivum mathematicum},
     pages = {83--87},
     publisher = {mathdoc},
     volume = {25},
     number = {1-2},
     year = {1989},
     mrnumber = {1189202},
     zbl = {0705.54001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1989__25_1-2_a10/}
}