@article { the-formula-two-times-two-is-four-in-the-russian-classics-and-its-possible-origins,
	title = {The formula “two times two is four” in the Russian classics and its possible origins},
	journal = {Two centuries of the Russian classics},
	pages = {128-147 },
	year = {2019},
	volume = {1},
	number = {1},
	doi = {10.22455/2686-7494-2019-1-1-128-147 },
	author = {Sytina Yu. N., ,}
}