TY  - JOUR
AU  - V. V. Yevstafyeva
TI  - Existence of~$T/k$-Periodic Solutions of a Nonlinear Nonautonomous System Whose Matrix Has a Multiple Eigenvalue
JO  - Matematičeskie zametki
PY  - 2021
SP  - 529
EP  - 543
VL  - 109
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_2021_109_4_a3/
LA  - ru
ID  - MZM_2021_109_4_a3
ER  -