%0 Journal Article %T Seminar on Qualitative Theory of Differential Equations at Moscow State University %J Differencialʹnye uravneniâ %D 2002 %P 1567-1580 %V 38 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2002_38_11_a16/ %G ru %F DE_2002_38_11_a16