TY - JOUR AU - V. E. Chernyshev TI - The absence of smooth invariant tori with irrational rotation number for systems of differential equations with smoothly stable structure JO - Differencialʹnye uravneniâ PY - 1969 SP - 2034 EP - 2040 VL - 5 IS - 11 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1969_5_11_a8/ LA - ru ID - DE_1969_5_11_a8 ER -