@article{MAN_1889__33_157412,
     author = {Horn},
     title = {Ueber die singul\"aren {Stellen} der {Integrale} einer linearen partiellen {Differentialgleichung}},
     journal = {Mathematische Annalen},
     pages = {310--314},
     publisher = {mathdoc},
     volume = {33},
     year = {1889},
     zbl = {20.0359.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1889__33_157412/}
}