%0 Journal Article %A V. S. Vladimirov %T Adelic Formulas for Four-Particle String and Superstring Tree Amplitudes in One-Class Quadratic Fields %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2004 %P 9-28 %V 245 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_2004_245_a1/ %G ru %F TM_2004_245_a1