TY  - JOUR
AU  - V. V. Fokicheva
TI  - Description of singularities for system “billiard in an ellipse”
JO  - Vestnik Moskovskogo universiteta. Matematika, mehanika
PY  - 2012
SP  - 31
EP  - 34
IS  - 5
UR  - http://geodesic.mathdoc.fr/item/VMUMM_2012_5_a5/
LA  - ru
ID  - VMUMM_2012_5_a5
ER  -