@book{66388,
	author = {Schubert, Hermann, and McCormack, Thomas J.},
	title = {Mathematical Essays and Recreations},
	publisher = {Project Gutenberg,},
	year = {2008},
	address = {Salt Lake City, UT :},
	note = {Release date is 2008-05-09},
	url = {https://www.gutenberg.org/ebooks/25387}
}