@article{JRAM_1880__89_183448,
     author = {G. Frobenius},
     title = {Zur {Theorie} der {Transformation} der {Thetafunctionen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {40--46},
     publisher = {mathdoc},
     volume = {89},
     year = {1880},
     zbl = {12.0367.01},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1880__89_183448/}
}