@article{10_1090_S0894_0347_03_00446_6,
     author = {Bourgain, Jean and Chang, Mei-Chu},
     title = {On the size of {\dh}‘˜-fold sum and product sets of integers},
     journal = {Journal of the American Mathematical Society},
     pages = {473--497},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {2004},
     doi = {10.1090/S0894-0347-03-00446-6},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-03-00446-6/}
}