@article{JRAM_1834__11_146876, author = {C.G.J. Jacobi}, title = {Demonstratio formulae ... .}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {307--307}, publisher = {mathdoc}, volume = {11}, year = {1834}, url = {http://geodesic.mathdoc.fr/item/JRAM_1834__11_146876/} }