%0 Journal Article
%A S. A. Gel'fer
%T On the maximum of the conformal radius of the fundamental region of a doubly-periodic group
%J Doklady Akademii Nauk
%D 1957
%P 241-244
%V 114
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1957_114_2_a1/
%G ru
%F DAN_1957_114_2_a1