@article{TM_1978_148_a18,
     author = {A. G. Postnikov},
     title = {A~new derivation of a~formula for the number of classes of binary quadratic forms of a~negative discriminant in the function-field case},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {195--200},
     publisher = {mathdoc},
     volume = {148},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1978_148_a18/}
}