@article{CMH_1969__44_139396,
     author = {Simon Courant},
     title = {Beitr\"age zur {Theorie} der limitierten {Vektorr\"aume.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {249--268},
     year = {1969},
     volume = {44},
     zbl = {0176.42403},
     url = {http://geodesic.mathdoc.fr/item/CMH_1969__44_139396/}
}