TY  - JOUR
AU  - V. Dragović
AU  - M. Radnović
TI  - Topological invariants for elliptical billiards and geodesics on ellipsoids in the Minkowski space
JO  - Fundamentalʹnaâ i prikladnaâ matematika
PY  - 2015
SP  - 51
EP  - 64
VL  - 20
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FPM_2015_20_2_a3/
LA  - ru
ID  - FPM_2015_20_2_a3
ER  -