%0 Journal Article %A C. Hooley %T On the Barban-Davenport-Halberstam theorem: IX %J Acta Arithmetica %D 1998 %P 17-30 %V 83 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-83-1-17-30/ %R 10.4064/aa-83-1-17-30 %G en %F 10_4064_aa_83_1_17_30