@article{IM2_1994_43_1_a2,
     author = {Z. Kh. Rakhmonov},
     title = {Theorem on the mean value of  $\psi(x,\chi)$ and its applications},
     journal = {Izvestiya. Mathematics },
     pages = {49--64},
     publisher = {mathdoc},
     volume = {43},
     number = {1},
     year = {1994},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1994_43_1_a2/}
}