TY  - JOUR
AU  - S. A. Grigoryan
AU  - R. N. Gumerov
TI  - On a~covering group theorem and its applications
JO  - Lobachevskii journal of mathematics
PY  - 2002
SP  - 9
EP  - 16
VL  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/LJM_2002_10_a1/
LA  - en
ID  - LJM_2002_10_a1
ER  -