%0 Journal Article %A Yu. T. Sil'chenko %T A Method for Studying a Coupled System of Differential Equations %J Differencialʹnye uravneniâ %D 2005 %P 844-850 %V 41 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2005_41_6_a15/ %G ru %F DE_2005_41_6_a15