TY  - JOUR
AU  - Walter Benz
TI  - On a functional equation arising from hyperbolic geometry.
JO  - Aequationes mathematicae
PY  - 1980
SP  - 113
EP  - 119
VL  - 21
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1980__21_182422/
ID  - AM2_1980__21_182422
ER  -