%0 Journal Article
%A È. B. Vinberg
%T The smallest field of definition of a~subgroup of the~group $\mathrm{PSL}_2$
%J Sbornik. Mathematics
%D 1995
%P 179-190
%V 80
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1995_80_1_a8/
%G en
%F SM_1995_80_1_a8