TY  - JOUR
AU  - A. M. Vershik
AU  - V. Ya. Gershkovich
TI  - Geodesic flow on $SL_2\mathbb R$ with non-holonomic constraints
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 1986
SP  - 7
EP  - 17
VL  - 155
UR  - http://geodesic.mathdoc.fr/item/ZNSL_1986_155_a1/
LA  - ru
ID  - ZNSL_1986_155_a1
ER  -