@article{10_4064_cm_62_1_67_71,
     author = {T. K\"orner},
     title = {A {Helson} set of uniqueness but not of synthesis},
     journal = {Colloquium Mathematicum},
     pages = {67--71},
     publisher = {mathdoc},
     volume = {62},
     number = {1},
     year = {1991},
     doi = {10.4064/cm-62-1-67-71},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-62-1-67-71/}
}