@article{SM_1986_53_2_a16,
     author = {B. V. Levin and N. M. Timofeev},
     title = {Mean distribution of arithmetic functions over progressions (theorems of {Vinogradov{\textendash}Bombieri} type)},
     journal = {Sbornik. Mathematics},
     pages = {563--580},
     year = {1986},
     volume = {53},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1986_53_2_a16/}
}