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@article{MO_2014_72_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}, publisher = {mathdoc}, volume = {72}, number = {4}, year = {2014}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MO_2014_72_4_a4/} }
V. M. Imaykin. On notions of length, square, and volume for high school. Matematičeskoe obrazovanie, Tome 72 (2014) no. 4, pp. 16-28. http://geodesic.mathdoc.fr/item/MO_2014_72_4_a4/