@article{JRAM_1892__109_148841,
     author = {Paul G\"unther},
     title = {Das {Additionstheorem} der elliptischen {Functionen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {213--221},
     publisher = {mathdoc},
     volume = {109},
     year = {1892},
     zbl = {24.0427.02},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1892__109_148841/}
}