%0 Journal Article %A V. P. Nozdracheva %T Estimates for periods of cycles generated by a singular cycle with two separatrices %J Differencialʹnye uravneniâ %D 1995 %P 1764-1765 %V 31 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1995_31_10_a23/ %G ru %F DE_1995_31_10_a23