@article{JRAM_1842__24_183235,
     author = {H. Grassman},
     title = {Theorie der {Centralen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {262--282},
     publisher = {mathdoc},
     volume = {24},
     year = {1842},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1842__24_183235/}
}