@article{MO_2019_1_a1,
     author = {S. V. Dvoryaninov},
     title = {On impossibility to construct a center of a circle by a ruler alone based on the method of visual constructions},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {9--12},
     year = {2019},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2019_1_a1/}
}