@article{JRAM_1850__40_147458,
     author = {G. Lejeune Dirichlet},
     title = {\"Uber die {Zerlegbarkeit} der {Zahlen} in drei {Quadrate.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {228--232},
     publisher = {mathdoc},
     volume = {40},
     year = {1850},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1850__40_147458/}
}