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@article{MZ_1982__181_173239, author = {Ralph St\"ocker}, title = {On a {Theorem} of {Barden.}}, journal = {Mathematische Zeitschrift}, pages = {365--372}, publisher = {mathdoc}, volume = {181}, year = {1982}, zbl = {0515.57011}, url = {http://geodesic.mathdoc.fr/item/MZ_1982__181_173239/} }
Ralph Stöcker. On a Theorem of Barden.. Mathematische Zeitschrift, Tome 181 (1982), pp. 365-372. http://geodesic.mathdoc.fr/item/MZ_1982__181_173239/