%0 Journal Article %A S. V. Gonchenko %A L. P. Shilnikov %T Hyperbolic properties of four-dimensional symplectic mappings with a structurally unstable trajectory homoclinic to a fixed point of the saddle-focus type %J Differencialʹnye uravneniâ %D 2000 %P 1464-1474 %V 36 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2000_36_11_a3/ %G ru %F DE_2000_36_11_a3