TY  - JOUR
AU  - S. E. Pustovoytov
TI  - Topological analysis of a~billiard in elliptic ring in a~potential field
JO  - Fundamentalʹnaâ i prikladnaâ matematika
PY  - 2019
SP  - 201
EP  - 225
VL  - 22
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FPM_2019_22_6_a8/
LA  - ru
ID  - FPM_2019_22_6_a8
ER  -