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@article{MZ_1951__54_169213, author = {Leopold Schmetterer}, title = {Bemerkungen zur {Multiplikation} unendlicher {Reihen.}}, journal = {Mathematische Zeitschrift}, pages = {102--114}, publisher = {mathdoc}, volume = {54}, year = {1951}, zbl = {0043.28601}, url = {http://geodesic.mathdoc.fr/item/MZ_1951__54_169213/} }
Leopold Schmetterer. Bemerkungen zur Multiplikation unendlicher Reihen.. Mathematische Zeitschrift, Tome 54 (1951), pp. 102-114. http://geodesic.mathdoc.fr/item/MZ_1951__54_169213/