%0 Journal Article %T On the seminar on qualitative theory of differential equations at Moscow State University %J Differencialʹnye uravneniâ %D 2006 %P 852-860 %V 42 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2006_42_6_a16/ %G ru %F DE_2006_42_6_a16