TY  - JOUR
AU  - O. S. Kostromina
TI  - On two-frequency quasi-periodic perturbations of systems close to two-dimensional Hamiltonian ones with a double limit cycle
JO  - Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki
PY  - 2021
SP  - 35
EP  - 49
VL  - 31
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VUU_2021_31_1_a2/
LA  - en
ID  - VUU_2021_31_1_a2
ER  -