%0 Journal Article %A A. G. Postnikov %T A~new derivation of a~formula for the number of classes of binary quadratic forms of a~negative discriminant in the function-field case %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1978 %P 195-200 %V 148 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1978_148_a18/ %G ru %F TM_1978_148_a18