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@article{MZ_1954__60_169409, author = {Heinz S\"ohngen}, title = {Zur {Theorie} der endlichen {Hilbert-Transformation.}}, journal = {Mathematische Zeitschrift}, pages = {31--51}, publisher = {mathdoc}, volume = {60}, year = {1954}, zbl = {0055.09502}, url = {http://geodesic.mathdoc.fr/item/MZ_1954__60_169409/} }
Heinz Söhngen. Zur Theorie der endlichen Hilbert-Transformation.. Mathematische Zeitschrift, Tome 60 (1954), pp. 31-51. http://geodesic.mathdoc.fr/item/MZ_1954__60_169409/