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@article{IM2_1971_5_6_a1, author = {A. F. Lavrik}, title = {A~method for estimating double sums with real quadratic character, and applications}, journal = {Izvestiya. Mathematics }, pages = {1195--1214}, publisher = {mathdoc}, volume = {5}, number = {6}, year = {1971}, language = {en}, url = {http://geodesic.mathdoc.fr/item/IM2_1971_5_6_a1/} }
A. F. Lavrik. A~method for estimating double sums with real quadratic character, and applications. Izvestiya. Mathematics , Tome 5 (1971) no. 6, pp. 1195-1214. http://geodesic.mathdoc.fr/item/IM2_1971_5_6_a1/