%0 Journal Article %A M. B. Sevryuk %T Partial Preservation of Frequencies and Floquet Exponents in KAM Theory %J Informatics and Automation %D 2007 %P 174-202 %V 259 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_2007_259_a11/ %G ru %F TRSPY_2007_259_a11