@article{IM2_2018_82_4_a0,
     author = {M. A. Korolev},
     title = {Kloosterman sums with multiplicative coefficients},
     journal = {Izvestiya. Mathematics },
     pages = {647--661},
     publisher = {mathdoc},
     volume = {82},
     number = {4},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2018_82_4_a0/}
}