@article{TM_1997_218_a26,
     author = {N. M. Timofeev},
     title = {Distribution in the mean in progressions of numbers with a~large number of prime factors},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {403--414},
     publisher = {mathdoc},
     volume = {218},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1997_218_a26/}
}