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@article{MAN_1957__133_160532, author = {H. R\"ohrl}, title = {Das {Riemann-Hilbertsche} {Problem} der {Theorie} der linearen {Differentialgleichungen.}}, journal = {Mathematische Annalen}, pages = {1--25}, publisher = {mathdoc}, volume = {133}, year = {1957}, zbl = {0088.06001}, url = {http://geodesic.mathdoc.fr/item/MAN_1957__133_160532/} }
H. Röhrl. Das Riemann-Hilbertsche Problem der Theorie der linearen Differentialgleichungen.. Mathematische Annalen, Tome 133 (1957), pp. 1-25. http://geodesic.mathdoc.fr/item/MAN_1957__133_160532/