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@article{MZ_1959__71_169822, author = {Wolfgang Walter}, title = {\"Uber die {Differentialgleichung} u... = f(x, y, u, u..., u...). {II.}}, journal = {Mathematische Zeitschrift}, pages = {436--453}, publisher = {mathdoc}, volume = {71}, year = {1959}, language = {de}, url = {http://geodesic.mathdoc.fr/item/MZ_1959__71_169822/} }
Wolfgang Walter. Über die Differentialgleichung u... = f(x, y, u, u..., u...). II.. Mathematische Zeitschrift, Tome 71 (1959), pp. 436-453. http://geodesic.mathdoc.fr/item/MZ_1959__71_169822/