%0 Journal Article %A Nour Ghazi %T On the Beckmann–Black problem %J Acta Arithmetica %D 2011 %P 265-274 %V 149 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa149-3-4/ %R 10.4064/aa149-3-4 %G en %F 10_4064_aa149_3_4