@article{MZ_1940__46_168890,
     author = {H., Hadwiger},
     title = {\"Uber das {UmordnungsprobIem} im {Hilbertschen} {Raum}},
     journal = {Mathematische Zeitschrift},
     pages = {70--79},
     publisher = {mathdoc},
     volume = {46},
     year = {1940},
     zbl = {0022.23104},
     url = {http://geodesic.mathdoc.fr/item/MZ_1940__46_168890/}
}