@article{MAN_1893__42_157660,
     author = {L. Koenigsberger},
     title = {Bemerkung zu dem {Existenzbeweise} der {Integrale} partieller {Differentialgleichungsysteme}},
     journal = {Mathematische Annalen},
     pages = {485--488},
     publisher = {mathdoc},
     volume = {42},
     year = {1893},
     zbl = {25.0595.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1893__42_157660/}
}