@misc{MZ_1921__10_183570,
     title = {[unknown]},
     journal = {Mathematische Zeitschrift},
     pages = {130--159},
     publisher = {mathdoc},
     volume = {10},
     year = {1921},
     url = {http://geodesic.mathdoc.fr/item/MZ_1921__10_183570/}
}