@article{MZ_1933__36_168405,
     author = {A., W\"unsche},
     title = {Topologische {Fragen} der {Differentialgeometrie.} {XLI.} {Ein} {Diagonalproblem}},
     journal = {Mathematische Zeitschrift},
     pages = {358--376},
     publisher = {mathdoc},
     volume = {36},
     year = {1933},
     zbl = {0006.32703},
     url = {http://geodesic.mathdoc.fr/item/MZ_1933__36_168405/}
}