TY - JOUR AU - A. M. Samoilenko TI - Necessary conditions for the existence of invariant tori of linear extensions of dynamical systems on a torus JO - Differencialʹnye uravneniâ PY - 1980 SP - 1427 EP - 1437 VL - 16 IS - 8 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1980_16_8_a8/ LA - ru ID - DE_1980_16_8_a8 ER -