@article{AA_1989_1_3_a1,
     author = {A. N. Andrianov},
     title = {Dirichlet series that correspond to representations of zero by indefinite quadratic forms},
     journal = {Algebra i analiz},
     pages = {71--82},
     publisher = {mathdoc},
     volume = {1},
     number = {3},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1989_1_3_a1/}
}