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@article{MAN_1957__133_160553, author = {H. Werner}, title = {Das {Problem} von {Douglas} f\"ur {Fl\"achen} konstanter mittlerer {Kr\"ummung.}}, journal = {Mathematische Annalen}, pages = {303--319}, publisher = {mathdoc}, volume = {133}, year = {1957}, zbl = {0077.34901}, url = {http://geodesic.mathdoc.fr/item/MAN_1957__133_160553/} }
H. Werner. Das Problem von Douglas für Flächen konstanter mittlerer Krümmung.. Mathematische Annalen, Tome 133 (1957), pp. 303-319. http://geodesic.mathdoc.fr/item/MAN_1957__133_160553/