@book{79927,
	author = {De Morgan, Augustus,},
	title = {On the study and difficulties of mathematics},
	publisher = {Project Gutenberg,},
	year = {2012},
	address = {Salt Lake City, UT :},
	note = {Release date is 2012-03-09},
	url = {https://www.gutenberg.org/ebooks/39088}
}