@article{10_1090_S0894_0347_05_00476_5,
     author = {Bourgain, J.},
     title = {Mordell\^a€™s exponential sum estimate revisited},
     journal = {Journal of the American Mathematical Society},
     pages = {477--499},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {2005},
     doi = {10.1090/S0894-0347-05-00476-5},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-05-00476-5/}
}