TY  - JOUR
AU  - V. V. Vedyushkina
AU  - V. A. Kibkalo
TI  - Realization of numeriсal invariant of the Siefert bundle of integrable systems by billiards
JO  - Vestnik Moskovskogo universiteta. Matematika, mehanika
PY  - 2020
SP  - 22
EP  - 28
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VMUMM_2020_4_a2/
LA  - ru
ID  - VMUMM_2020_4_a2
ER  -