@article{CMH_1966__41_139327,
     author = {Bruno Peter Zwahlen and H. Matzinger},
     title = {Orthogonalabgeschlossene {Mengen} und lineare {Topologien.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {303--306},
     year = {1966},
     volume = {41},
     zbl = {0144.16603},
     url = {http://geodesic.mathdoc.fr/item/CMH_1966__41_139327/}
}