@article{CRMATH_2003__337_8_499_0,
     author = {Bourgain, Jean and Chang, Mei-Chu},
     title = {On multiple sum and product sets of finite sets of integers},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {499--503},
     publisher = {Elsevier},
     volume = {337},
     number = {8},
     year = {2003},
     doi = {10.1016/j.crma.2003.08.010},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2003.08.010/}
}