@article{DAN_1972_206_4_a9,
     author = {V. I. Nechaev},
     title = {Trigonometric sums for recurrent sequences},
     journal = {Doklady Akademii Nauk},
     pages = {811--814},
     publisher = {mathdoc},
     volume = {206},
     number = {4},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_206_4_a9/}
}