%0 Journal Article %A B. Z. Shapiro %T Linear differential equations and real flag manifolds %J Funkcionalʹnyj analiz i ego priloženiâ %D 1989 %P 92-93 %V 23 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1989_23_1_a22/ %G ru %F FAA_1989_23_1_a22