TY  - JOUR
AU  - Walter Benz
TI  - The functional equation of distance preservance in spaces over rings. (Short Communication).
JO  - Aequationes mathematicae
PY  - 1977
SP  - 308
EP  - 308
VL  - 15
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1977__15_136663/
ID  - AM2_1977__15_136663
ER  -