@article{JRAM_1888__103_148723,
     author = {Matthias Lerch},
     title = {Ueber die {Nichtdifferentiirbarkeit} gewisser {Functionen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {126--138},
     publisher = {mathdoc},
     volume = {103},
     year = {1888},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1888__103_148723/}
}