TY  - JOUR
AU  - S. V. Dvoryaninov
TI  - On impossibility to construct a center of a circle by a ruler alone based on the method of visual constructions
JO  - Matematičeskoe obrazovanie
PY  - 2019
SP  - 9
EP  - 12
VL  - 89
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MO_2019_89_1_a1/
LA  - ru
ID  - MO_2019_89_1_a1
ER  -