@article{JRAM_1870__72_148132,
     author = {L. Schl\"afli},
     title = {Ueber die partielle {Differentialgleichung} ... .},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {263--284},
     year = {1870},
     volume = {72},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1870__72_148132/}
}