@article{MAN_1903__57_158087,
     author = {Edmund Landau},
     title = {\"Uber die {Darstellung} definiter bin\"arer {Formen} durch {Quadrate}},
     journal = {Mathematische Annalen},
     pages = {53--64},
     publisher = {mathdoc},
     volume = {57},
     year = {1903},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1903__57_158087/}
}