%0 Journal Article %A Yu. N. Shteinikov %T Estimates of Trigonometric Sums over Subgroups and Some of Their Applications %J Matematičeskie zametki %D 2015 %P 606-625 %V 98 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_2015_98_4_a9/ %G ru %F MZM_2015_98_4_a9