@article{JRAM_1834__12_146890,
     author = {Karl Schellbach},
     title = {\"Uber die {Zeichen} der {Mathematik.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {70--81},
     publisher = {mathdoc},
     volume = {12},
     year = {1834},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1834__12_146890/}
}