@article{IM2_2008_72_1_a7,
     author = {I. D. Shkredov},
     title = {On sets of large trigonometric sums},
     journal = {Izvestiya. Mathematics },
     pages = {149--168},
     publisher = {mathdoc},
     volume = {72},
     number = {1},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2008_72_1_a7/}
}