@article{ZNSL_1983_121_a13,
     author = {B. M. Shirokow},
     title = {The distribution of values of arithmetical functions in residue classes},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {176--186},
     year = {1983},
     volume = {121},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1983_121_a13/}
}