@article{MZ_1934__38_168497,
     author = {J. Schauder},
     title = {\"Uber lineare elliptische {Differeiitialgleichungen} zweiter {Ordnung}},
     journal = {Mathematische Zeitschrift},
     pages = {257--282},
     publisher = {mathdoc},
     volume = {38},
     year = {1934},
     zbl = {0008.25502},
     url = {http://geodesic.mathdoc.fr/item/MZ_1934__38_168497/}
}