@article{JRAM_1879__87_148413,
     author = {C.W. Borchardt},
     title = {Zusatz zur obigen {Abhandlung:} {\"Uber} {...-Functionen} von drei {Variabeln.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {169--171},
     publisher = {mathdoc},
     volume = {87},
     year = {1879},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1879__87_148413/}
}