@article{MAN_1926__95_159117,
     author = {O. Perron},
     title = {\"Uber {Ein-} und {Mehrdeutigkeit} des {Integrals} eines {Systems} von {Differentialgleichungen}},
     journal = {Mathematische Annalen},
     pages = {98--101},
     publisher = {mathdoc},
     volume = {95},
     year = {1926},
     zbl = {51.0331.07},
     url = {http://geodesic.mathdoc.fr/item/MAN_1926__95_159117/}
}