%0 Journal Article %A M. G. Medvedeva %T Investigation of the stability of systems that have limit cycles %J Differencialʹnye uravneniâ %D 1992 %P 1280-1283 %V 28 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1992_28_7_a24/ %G ru %F DE_1992_28_7_a24