@article{MAN_1905__61_158244,
     author = {Edmund Landau},
     title = {\"Uber einen {Satz} von {Tschebyschef.}},
     journal = {Mathematische Annalen},
     pages = {527--550},
     year = {1905},
     volume = {61},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1905__61_158244/}
}