@article{10_4064_cm_15_1_87_92,
     author = {J.-P. Kahane},
     title = {Ensembles de {Ryll-Nardzewski} et ensembles de {Helson}},
     journal = {Colloquium Mathematicum},
     pages = {87--92},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1966},
     doi = {10.4064/cm-15-1-87-92},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-15-1-87-92/}
}