%0 Journal Article %A V. S. Samovol %T Finitely Smooth Normal Form of an Autonomous System with Two Pure Imaginary Roots %J Matematičeskie zametki %D 2006 %P 270-281 %V 80 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_2006_80_2_a12/ %G ru %F MZM_2006_80_2_a12