@article{JRAM_1868__69_148058,
     author = {C.F. Geiser},
     title = {Zur {Theorie} der {Fl\"achen} zweiten und dritten {Grades.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {197--221},
     publisher = {mathdoc},
     volume = {69},
     year = {1868},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1868__69_148058/}
}