@article{IM2_1995_45_2_a1,
     author = {S. A. Gritsenko},
     title = {Approximate functional equation for the~product of two {Dirichlet} $L$-functions},
     journal = {Izvestiya. Mathematics},
     pages = {255--280},
     year = {1995},
     volume = {45},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1995_45_2_a1/}
}