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@article{MZ_1972__125_171698, author = {Hans-Wilhelm Burmann}, title = {Zur hypergeometrischen {Differentialgleichung} in {Banachalgebren.}}, journal = {Mathematische Zeitschrift}, pages = {139--176}, publisher = {mathdoc}, volume = {125}, year = {1972}, zbl = {0222.34057}, url = {http://geodesic.mathdoc.fr/item/MZ_1972__125_171698/} }
Hans-Wilhelm Burmann. Zur hypergeometrischen Differentialgleichung in Banachalgebren.. Mathematische Zeitschrift, Tome 125 (1972), pp. 139-176. http://geodesic.mathdoc.fr/item/MZ_1972__125_171698/