TY  - JOUR
AU  - Roman Boutellier
TI  - Curvature and Functions with Bounded Boundary Rotation.
JO  - Mathematische Zeitschrift
PY  - 1981
SP  - 395
EP  - 400
VL  - 177
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1981__177_173072/
ID  - MZ_1981__177_173072
ER  -