@article{JRAM_1884__96_183451,
     author = {O. B\"oklen},
     title = {Ueber die {Kr\"ummung} der {Fl\"achen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {152--181},
     publisher = {mathdoc},
     volume = {96},
     year = {1884},
     zbl = {16.0667.01},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1884__96_183451/}
}