@article{JRAM_1878__85_148376,
     author = {O. R\"othig},
     title = {Zur {Theorie} der {Fl\"achen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {250--263},
     publisher = {mathdoc},
     volume = {85},
     year = {1878},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1878__85_148376/}
}