%0 Journal Article %T Seminar on qualitative theory of differential equations at Moscow State University %J Differencialʹnye uravneniâ %D 2004 %P 1570-1578 %V 40 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2004_40_11_a16/ %G ru %F DE_2004_40_11_a16