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@article{MZ_1957__67_169648, author = {Elmar Thoma}, title = {Zur {Reduktionstheorie} in sparablen {Hilbert-R\"aumen.}}, journal = {Mathematische Zeitschrift}, pages = {1--9}, publisher = {mathdoc}, volume = {67}, year = {1957}, zbl = {0077.10505}, url = {http://geodesic.mathdoc.fr/item/MZ_1957__67_169648/} }
Elmar Thoma. Zur Reduktionstheorie in sparablen Hilbert-Räumen.. Mathematische Zeitschrift, Tome 67 (1957), pp. 1-9. http://geodesic.mathdoc.fr/item/MZ_1957__67_169648/