@article{IM2_1993_41_2_a3,
     author = {S. M. Voronin},
     title = {On~Kloosterman sums},
     journal = {Izvestiya. Mathematics},
     pages = {229--271},
     year = {1993},
     volume = {41},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1993_41_2_a3/}
}