TY  - JOUR
AU  - Bourgain, Jean
AU  - Chang, Mei-Chu
TI  - Sum-product theorem and exponential sum estimates in residue classes with modulus involving few prime factors
JO  - Comptes Rendus. Mathématique
PY  - 2004
SP  - 463
EP  - 466
VL  - 339
IS  - 7
PB  - Elsevier
UR  - http://www.numdam.org/articles/10.1016/j.crma.2004.08.007/
DO  - 10.1016/j.crma.2004.08.007
LA  - en
ID  - CRMATH_2004__339_7_463_0
ER  -