%0 Journal Article %A V. M. Buchstaber %T Ring of Simple Polytopes and Differential Equations %J Informatics and Automation %D 2008 %P 18-43 %V 263 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_2008_263_a2/ %G ru %F TRSPY_2008_263_a2