@article{GDZPPN002190559,
title = {On the Barban-Davenport-Halberstam theorem. I.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {272},
year = {1975},
pages = {206-223},
zbl = {0304.10027},
url = {http://dml.mathdoc.fr/item/GDZPPN002190559}
}
Hooley, Christopher. On the Barban-Davenport-Halberstam theorem. I.. Journal für die reine und angewandte Mathematik, Tome 272 (1975) pp. 206-223. http://gdmltest.u-ga.fr/item/GDZPPN002190559/