@article{MAN_1922__86_158941,
     author = {W. Sternberg},
     title = {\"Uber die asymptotische {Integration} partieller {Differentialgleichungen} mit {Parameter.} {(Erste} {Mitteilung.)}},
     journal = {Mathematische Annalen},
     pages = {140--153},
     publisher = {mathdoc},
     volume = {86},
     year = {1922},
     zbl = {48.0576.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1922__86_158941/}
}