@article{MO_2014_4_a4,
     author = {V. M. Imaykin},
     title = {On notions of length, square, and volume for high school},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {16--28},
     year = {2014},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2014_4_a4/}
}