@article{JRAM_1834__12_146900,
     author = {C.G.J. Jacobi},
     title = {De compositione numerorum e quatuor quadratis.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {167--172},
     year = {1834},
     volume = {12},
     language = {la},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1834__12_146900/}
}