@article{JRAM_1878__85_148373,
     author = {G. Frobenius},
     title = {Ueber adjungirte lineare {Differentialausdr\"ucke.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {185--213},
     year = {1878},
     volume = {85},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1878__85_148373/}
}