@article{JRAM_1892__110_148864,
     author = {F. Schottky},
     title = {Ueber das {Additionstheorem} der {Cotangente} und der {Function} ...(u) = ... .},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {324--337},
     publisher = {mathdoc},
     volume = {110},
     year = {1892},
     zbl = {24.0427.03},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1892__110_148864/}
}