%0 Journal Article %A S. V. Gonchenko %A A. S. Markichev %A A. E. Shatalin %T Stable Periodic Trajectories of Two-Dimensional Diffeomorphisms Close to a Diffeomorphism with a Structurally Unstable Heteroclinic Contour %J Differencialʹnye uravneniâ %D 2001 %P 191-201 %V 37 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2001_37_2_a5/ %G ru %F DE_2001_37_2_a5