TY  - JOUR
AU  - B. Zh. Omarova
AU  - Zh. A. Sartabanov
TI  - On multiperiodic solutions of perturbed nonlinear autonomous systems with the differentiation operator on a vector field
JO  - Eurasian mathematical journal
PY  - 2021
SP  - 68
EP  - 81
VL  - 12
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/EMJ_2021_12_1_a6/
LA  - en
ID  - EMJ_2021_12_1_a6
ER  -