@article{DAN_1975_224_4_a4,
     author = {D. A. Mit'kin},
     title = {On estimates for rational trigonometric sums of a special form},
     journal = {Doklady Akademii Nauk},
     pages = {760--763},
     publisher = {mathdoc},
     volume = {224},
     number = {4},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_224_4_a4/}
}