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@article{IM2_1970_4_2_a2, author = {A. A. Karatsuba}, title = {Sums of characters over prime numbers}, journal = {Izvestiya. Mathematics }, pages = {303--326}, publisher = {mathdoc}, volume = {4}, number = {2}, year = {1970}, language = {en}, url = {http://geodesic.mathdoc.fr/item/IM2_1970_4_2_a2/} }
A. A. Karatsuba. Sums of characters over prime numbers. Izvestiya. Mathematics , Tome 4 (1970) no. 2, pp. 303-326. http://geodesic.mathdoc.fr/item/IM2_1970_4_2_a2/