@article{MZ_1933__37_168426,
     author = {E. Landau and H. Heilbronn},
     title = {Ein {Satz} \"uber {Potenzreihen.}},
     journal = {Mathematische Zeitschrift},
     pages = {17--17},
     publisher = {mathdoc},
     volume = {37},
     year = {1933},
     zbl = {59.0254.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1933__37_168426/}
}