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@article{10_4064_cm_2_1_7_8, author = {Henry Helson}, title = {On a problem of {Sikorski}}, journal = {Colloquium Mathematicum}, pages = {7--8}, publisher = {mathdoc}, volume = {2}, number = {1}, year = {1949}, doi = {10.4064/cm-2-1-7-8}, language = {pl}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-2-1-7-8/} }
Henry Helson. On a problem of Sikorski. Colloquium Mathematicum, Tome 2 (1949) no. 1, pp. 7-8. doi : 10.4064/cm-2-1-7-8. http://geodesic.mathdoc.fr/articles/10.4064/cm-2-1-7-8/
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