@article{JRAM_1912__141_149376,
     author = {J. Horn},
     title = {Zur {Theorie} der nicht linearen {Differential-} und {Differenzengleichungen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {182--216},
     publisher = {mathdoc},
     volume = {141},
     year = {1912},
     zbl = {43.0409.01},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1912__141_149376/}
}