TY  - JOUR
AU  - S. A. Gel'fer
TI  - On the maximum of the conformal radius of the fundamental region of a doubly-periodic group
JO  - Doklady Akademii Nauk
PY  - 1957
SP  - 241
EP  - 244
VL  - 114
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1957_114_2_a1/
LA  - ru
ID  - DAN_1957_114_2_a1
ER  -