@article{10_4064_cm_3_2_113_117,
     author = {Henry Helson},
     title = {On a theorem of {F.} and {M.} {Riesz}},
     journal = {Colloquium Mathematicum},
     pages = {113--117},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1954},
     doi = {10.4064/cm-3-2-113-117},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-3-2-113-117/}
}