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@article{MAN_1890__35_157458, author = {Harnack}, title = {Beitr\"age zur {Theorie} des {Cauchy'schen} {Integrales}}, journal = {Mathematische Annalen}, pages = {1--18}, publisher = {mathdoc}, volume = {35}, year = {1890}, zbl = {21.0994.02}, url = {http://geodesic.mathdoc.fr/item/MAN_1890__35_157458/} }
Harnack. Beiträge zur Theorie des Cauchy'schen Integrales. Mathematische Annalen, Tome 35 (1890), pp. 1-18. http://geodesic.mathdoc.fr/item/MAN_1890__35_157458/