TY  - JOUR
AU  - Walter Benz
TI  - An elementary proof of the Theorem of Beckmann and Quarles.
JO  - Elemente der Mathematik
PY  - 1987
SP  - 4
EP  - 9
VL  - 42
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ELMA_1987__42_4_141394/
ID  - ELMA_1987__42_4_141394
ER  -