@book{100074,
	author = {Eddington, Arthur Stanley, Sir,},
	title = {The Mathematical Theory of Relativity},
	publisher = {Project Gutenberg,},
	year = {2019},
	address = {Salt Lake City, UT :},
	note = {Release date is 2019-04-11},
	url = {https://www.gutenberg.org/ebooks/59248}
}