%0 Journal Article %A N. I. Avdonin %T Examples of the generation of a limit cycle from a separatrix loop and a singular cycle %J Differencialʹnye uravneniâ %D 1969 %P 1335-1337 %V 5 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1969_5_7_a21/ %G ru %F DE_1969_5_7_a21