TY  - JOUR
AU  - V. V. Kozlov
TI  - Groups of symmetries of geodesic flows on closed surfaces
JO  - Matematičeskie zametki
PY  - 1990
SP  - 62
EP  - 67
VL  - 48
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1990_48_5_a6/
LA  - ru
ID  - MZM_1990_48_5_a6
ER  -