%0 Journal Article %A Jean Bourgain %A S.V. Konyagin %T Estimates for the number of sums and products and for exponential sums over subgroups in fields of prime order %J Comptes Rendus. Mathématique %D 2003 %P 75-80 %V 337 %N 2 %I Elsevier %R 10.1016/S1631-073X(03)00281-4 %G en %F CRMATH_2003__337_2_75_0