%0 Journal Article %A V. M. Buchstaber %T Functional equations associated with addition theorems for elliptic functions and two-valued algebraic groups %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1990 %P 213-215 %V 45 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1990_45_3_a3/ %G en %F RM_1990_45_3_a3