@book{57915,
	author = {Rachinskii, Sergei Aleksandrovich,},
	title = {1001 задача для умственного счета},
	publisher = {Project Gutenberg,},
	year = {2005},
	address = {Salt Lake City, UT :},
	note = {Release date is 2005-08-14},
	url = {https://www.gutenberg.org/ebooks/16527}
}