%0 Journal Article %A D. A. Mit'kin %T An elementary proof of A. Weil's estimate for rational trigonometric sums with a prime denominator %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1986 %P 14-17 %N 6 %U http://geodesic.mathdoc.fr/item/IVM_1986_6_a2/ %G ru %F IVM_1986_6_a2