@article{MAN_1875__9_156699,
     author = {Lie},
     title = {Allgemeine {Theorie} der partiellen {Differentialgleichungen} erster {Ordnung}},
     journal = {Mathematische Annalen},
     pages = {245--296},
     publisher = {mathdoc},
     volume = {9},
     year = {1875},
     zbl = {07.0225.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1875__9_156699/}
}