@article{TM_1981_158_a10,
     author = {V. I. Nechaev and V. L. Topunov},
     title = {Estimation of the modulus of complete rational trigonometric sums of degree three and four},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {125--129},
     publisher = {mathdoc},
     volume = {158},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1981_158_a10/}
}