@article{MAN_1896__47_157790,
     author = {E. von Weber},
     title = {Die {Charakteristiken} der partiellen {Differentialgleichungen} in drei {Variabeln}},
     journal = {Mathematische Annalen},
     pages = {229--262},
     publisher = {mathdoc},
     volume = {47},
     year = {1896},
     zbl = {27.0274.03},
     url = {http://geodesic.mathdoc.fr/item/MAN_1896__47_157790/}
}