@article{TM_1959_53_a6,
     author = {V. P. Il'in},
     title = {On a theorem of {G.} {H.~Hardy} and {J.} {E.~Littlewood}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {128--144},
     year = {1959},
     volume = {53},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1959_53_a6/}
}