%0 Journal Article %A S. V. Bochkarev %T Multiplicative Bounds for $L_1$-Norms of Exponential Sums %J Contemporary Mathematics. Fundamental Directions %D 2007 %P 49-57 %V 25 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMFD_2007_25_a4/ %G ru %F CMFD_2007_25_a4