- Jean Bourgain, Mei-Chu Chang, “Sum-product theorem and exponential sum estimates in residue classes with modulus involving few prime factors”, Comptes Rendus. Mathématique, 339, no. 7, 2004,
463 
- Jean Bourgain, “New bounds on exponential sums related to the Diffie–Hellman distributions”, Comptes Rendus. Mathématique, 338, no. 11, 2004,
825