@article{JRAM_1884__96_183462,
     author = {G. Frobenius},
     title = {Ueber {Gruppen} von {Thetacharakteristiken.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {81--99},
     year = {1884},
     volume = {96},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1884__96_183462/}
}