@article{JRAM_1828__3_183113,
     author = {A. Hellerung},
     title = {Lehrsatz. {(Zu} beweisen).},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {312--312},
     year = {1828},
     volume = {3},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1828__3_183113/}
}