TY - JOUR AU - Yu. N. Shteinikov TI - Estimates of Trigonometric Sums over Subgroups and Some of Their Applications JO - Matematičeskie zametki PY - 2015 SP - 606 EP - 625 VL - 98 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_2015_98_4_a9/ LA - ru ID - MZM_2015_98_4_a9 ER -