%0 Journal Article %A Colin Graham %T Helson sets and simultaneous extensions to Fourier transforms %J Studia Mathematica %D 1972 %P 57-60 %V 43 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-43-1-57-60/ %R 10.4064/sm-43-1-57-60 %G en %F 10_4064_sm_43_1_57_60