%0 Journal Article %A Paul Pollack %T A simple proof of a theorem of Hajdu–Jarden–Narkiewicz %J Colloquium Mathematicum %D 2017 %P 217-220 %V 147 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm7054-9-2016/ %R 10.4064/cm7054-9-2016 %G pl %F 10_4064_cm7054_9_2016