@article{MZ_1920__6_167565,
     author = {H., Cramer},
     title = {Bemerkung zu der vorstehenden {Arbeit} des {Herrn} {E.} {Landau}},
     journal = {Mathematische Zeitschrift},
     pages = {155--157},
     publisher = {mathdoc},
     volume = {6},
     year = {1920},
     zbl = {47.0290.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1920__6_167565/}
}