@article{DAN_1968_180_1_a6,
     author = {A. A. Polyanskii},
     title = {An analogue of the {Hardy-Littlewood} equation},
     journal = {Doklady Akademii Nauk},
     pages = {29--31},
     publisher = {mathdoc},
     volume = {180},
     number = {1},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_180_1_a6/}
}