@article{IM2_2014_78_2_a3,
     author = {I. D. Kan and D. A. Frolenkov},
     title = {A strengthening of a~theorem of {Bourgain} and {Kontorovich}},
     journal = {Izvestiya. Mathematics},
     pages = {293--353},
     year = {2014},
     volume = {78},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2014_78_2_a3/}
}