TY  - JOUR
AU  - Edgar Reich
AU  - Kurt Strebel
TI  - On the Extremality of Certain Teichmüller Mappings.
JO  - Commentarii mathematici Helvetici
PY  - 1970
SP  - 353
EP  - 362
VL  - 45
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1970__45_139444/
ID  - CMH_1970__45_139444
ER  -