TY  - JOUR
AU  - Yu. N. Bibikov
AU  - V. A. Pliss
TI  - The existence of invariant tori in the neighborhood of the zero solution of a system of ordinary differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1967
SP  - 1864
EP  - 1881
VL  - 3
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1967_3_11_a2/
LA  - ru
ID  - DE_1967_3_11_a2
ER  -