@article{JRAM_1840__20_147084,
     author = {Hermann Umpfenbach},
     title = {Ueber die {Sonderung} der {Wurzeln} einer {Gleichung.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {60--61},
     publisher = {mathdoc},
     volume = {20},
     year = {1840},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1840__20_147084/}
}