@article{MZ_1949__51_169081,
     author = {G., K\"othe},
     title = {Die {Stufenr\"aume,} eine einfache {Klasse} linearer vollkommener {R\"aume}},
     journal = {Mathematische Zeitschrift},
     pages = {317--345},
     publisher = {mathdoc},
     volume = {51},
     year = {1949},
     zbl = {0031.03402},
     url = {http://geodesic.mathdoc.fr/item/MZ_1949__51_169081/}
}