TY  - JOUR
AU  - È. B. Vinberg
TI  - The smallest field of definition of a subgroup of the group $\mathrm{PSL}_2$
JO  - Sbornik. Mathematics
PY  - 1995
SP  - 179
EP  - 190
VL  - 80
IS  - 1
UR  - http://geodesic.mathdoc.fr/item/SM_1995_80_1_a8/
LA  - en
ID  - SM_1995_80_1_a8
ER  -