TY  - JOUR
AU  - CHRISTIAN GRAM
TI  - A remark on the construction of the centre of a circle by means of the ruler
JO  - Mathematica Scandinavica
PY  - 1956
SP  - 157
EP  - 160
VL  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1956__4_165619/
ID  - MS2_1956__4_165619
ER  -