TY  - JOUR
AU  - B. Alpers
TI  - Note on angle-preserving mappings.
JO  - Aequationes mathematicae
PY  - 1990
SP  - 1
EP  - 7
VL  - 40
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1990__40_1_137357/
ID  - AM2_1990__40_1_137357
ER  -