@article{DAN_1993_331_3_a6,
     author = {Z. Kh. Rakhmonov},
     title = {Mean values of the {Chebyshev} function},
     journal = {Doklady Akademii Nauk},
     pages = {281--282},
     publisher = {mathdoc},
     volume = {331},
     number = {3},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1993_331_3_a6/}
}