%0 Journal Article %A A. V. Savkin %T Absolute stability of nonlinear systems with high-frequency parametric excitation %J Differencialʹnye uravneniâ %D 1994 %P 1282-1283 %V 30 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1994_30_7_a25/ %G ru %F DE_1994_30_7_a25