%0 Journal Article %A Todd Cochrane %A Zhiyong Zheng %T Pure and mixed exponential sums %J Acta Arithmetica %D 1999 %P 249-278 %V 91 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-91-3-249-278/ %R 10.4064/aa-91-3-249-278 %G en %F 10_4064_aa_91_3_249_278