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@article{AM2_1971__6_136176, author = {KLAUS DEIMLING}, title = {Das {Goursat-Problem} f\"ur uxy = f(x, y, u) {(Short} {Communication)}}, journal = {Aequationes mathematicae}, pages = {117--118}, publisher = {mathdoc}, volume = {6}, year = {1971}, url = {http://geodesic.mathdoc.fr/item/AM2_1971__6_136176/} }
KLAUS DEIMLING. Das Goursat-Problem für uxy = f(x, y, u) (Short Communication). Aequationes mathematicae, Tome 6 (1971), pp. 117-118. http://geodesic.mathdoc.fr/item/AM2_1971__6_136176/