TY  - JOUR
AU  - Lars L. Ahlfors
TI  - Open Riemann Surfaces and Extremal Problems on Compact Subregions.
JO  - Commentarii mathematici Helvetici
PY  - 1950
SP  - 100
EP  - 134
VL  - 24
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1950__24_139001/
ID  - CMH_1950__24_139001
ER  -