TY  - JOUR
AU  - V. V. Fokicheva
TI  - Description of singularities for billiard systems bounded by confocal ellipses or hyperbolas
JO  - Vestnik Moskovskogo universiteta. Matematika, mehanika
PY  - 2014
SP  - 18
EP  - 27
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VMUMM_2014_4_a2/
LA  - ru
ID  - VMUMM_2014_4_a2
ER  -