%0 Journal Article %A Carl Herz %T Drury's lemma and Helson sets %J Studia Mathematica %D 1972 %P 205-219 %V 42 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-42-3-205-219/ %R 10.4064/sm-42-3-205-219 %G en %F 10_4064_sm_42_3_205_219