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@article{IM2_2014_78_4_a1, author = {J. Bourgain and M. Z. Garaev}, title = {Sumsets of reciprocals in prime fields and multilinear {Kloosterman} sums}, journal = {Izvestiya. Mathematics }, pages = {656--707}, publisher = {mathdoc}, volume = {78}, number = {4}, year = {2014}, language = {en}, url = {http://geodesic.mathdoc.fr/item/IM2_2014_78_4_a1/} }
J. Bourgain; M. Z. Garaev. Sumsets of reciprocals in prime fields and multilinear Kloosterman sums. Izvestiya. Mathematics , Tome 78 (2014) no. 4, pp. 656-707. http://geodesic.mathdoc.fr/item/IM2_2014_78_4_a1/