TY  - JOUR
AU  - Walter Benz
TI  - On a general principle in geometry that leads to functional equations.
JO  - Aequationes mathematicae
PY  - 1993
SP  - 3
EP  - 10
VL  - 46
IS  - 2-3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1993__46_2-3_137535/
ID  - AM2_1993__46_2-3_137535
ER  -