TY  - JOUR
AU  - S. L. Krushkal'
TI  - On the theory of extremal problems for quasi-conformal mappings of closed Riemann surfaces
JO  - Doklady Akademii Nauk
PY  - 1966
SP  - 784
EP  - 787
VL  - 171
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1966_171_4_a5/
LA  - ru
ID  - DAN_1966_171_4_a5
ER  -