@article{IM2_1997_61_2_a3,
     author = {A. A. Karatsuba},
     title = {Additive congruences},
     journal = {Izvestiya. Mathematics},
     pages = {317--329},
     year = {1997},
     volume = {61},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1997_61_2_a3/}
}