@article{PORMA_1979__38_1-2_115362,
     author = {Miles, Frank B.},
     title = {A note on {Helson} sets},
     journal = {Portugaliae mathematica},
     pages = {1--4},
     publisher = {mathdoc},
     volume = {38},
     number = {1-2},
     year = {1979},
     mrnumber = {0682349},
     zbl = {0504.43010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1979__38_1-2_115362/}
}