%0 Journal Article %A V. E. Chernyshev %T The absence of smooth invariant tori with irrational rotation number for systems of differential equations with smoothly stable structure %J Differencialʹnye uravneniâ %D 1969 %P 2034-2040 %V 5 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1969_5_11_a8/ %G ru %F DE_1969_5_11_a8