@book{61315,
	author = {Smarandache, Florentin, and Signoret, Chantal},
	title = {Formules pour l'esprit},
	publisher = {Project Gutenberg,},
	year = {2006},
	address = {Salt Lake City, UT :},
	note = {Release date is 2006-12-04},
	url = {https://www.gutenberg.org/ebooks/20013}
}