%0 Journal Article %A Dmitri V. Bykov %T Flag Manifold Sigma Models and Nilpotent Orbits %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2020 %P 89-98 %V 309 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_2020_309_a5/ %G ru %F TM_2020_309_a5