%0 Journal Article %A H.L. Montgomery %A R.C. Vaughan %T Exponential Sums with Multiplicative Coefficients. %J Inventiones mathematicae %D 1977 %P 69-82 %V 43 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1977__43_142508/ %F IM_1977__43_142508