TY  - JOUR
AU  - M. V. Shamolin
TI  - Families of portraits of some pendulum-like systems in dynamics
JO  - Sibirskij žurnal industrialʹnoj matematiki
PY  - 2020
SP  - 144
EP  - 156
VL  - 23
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SJIM_2020_23_4_a10/
LA  - ru
ID  - SJIM_2020_23_4_a10
ER  -