@article{10_4064_aa_24_2_113_133,
     author = {H. Halberstam and H. Richert},
     title = {Bran's method and the {Fundamental} {Lemma}},
     journal = {Acta Arithmetica},
     pages = {113--133},
     publisher = {mathdoc},
     volume = {24},
     number = {2},
     year = {1973},
     doi = {10.4064/aa-24-2-113-133},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-24-2-113-133/}
}