%0 Journal Article %A L. A. Kalyakin %T Asymptotic Solution of the Threshold Phenomenon Problem for the Principal Resonance Equations %J Differencialʹnye uravneniâ %D 2004 %P 731-739 %V 40 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2004_40_6_a1/ %G ru %F DE_2004_40_6_a1