%0 Journal Article %A N. M. Khodzhaev %A V. N. Chubarikov %T Estimates of complete rational trigonometric sums and sums of Dirichlet characters %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2002 %P 17-23 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_2002_5_a3/ %G ru %F VMUMM_2002_5_a3