@misc{MZ_1935__39_183588,
     title = {[unknown]},
     journal = {Mathematische Zeitschrift},
     pages = {570--576},
     publisher = {mathdoc},
     volume = {39},
     year = {1935},
     url = {http://geodesic.mathdoc.fr/item/MZ_1935__39_183588/}
}