@article{MAN_1920__81_158825,
     author = {W. Sternberg},
     title = {\"Uber die asymptotische {Integration} von {Differentialgleichungen}},
     journal = {Mathematische Annalen},
     pages = {119--186},
     publisher = {mathdoc},
     volume = {81},
     year = {1920},
     zbl = {47.0395.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1920__81_158825/}
}