@article{JRAM_1898__119_149050,
     author = {Lothar Heffter},
     title = {Ueber {Abelsche} {Gruppen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {261--266},
     year = {1898},
     volume = {119},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1898__119_149050/}
}