%0 Journal Article %A A. V. Kochergin %T Nondegenerate Saddle Points and the Absence of Mixing in Flows on Surfaces %J Informatics and Automation %D 2007 %P 252-266 %V 256 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_2007_256_a12/ %G ru %F TRSPY_2007_256_a12