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@article{AM2_1971__6_136190, author = {KLAUS DEIMLING}, title = {Das {Goursat-Problem} f\"ur}, journal = {Aequationes mathematicae}, pages = {206--214}, publisher = {mathdoc}, volume = {6}, year = {1971}, zbl = {0222.35048}, url = {http://geodesic.mathdoc.fr/item/AM2_1971__6_136190/} }
KLAUS DEIMLING. Das Goursat-Problem für. Aequationes mathematicae, Tome 6 (1971), pp. 206-214. http://geodesic.mathdoc.fr/item/AM2_1971__6_136190/