@book{70653,
	author = {Ribaucour, Albert,},
	title = {Étude des Élassoïdes, ou, Surfaces A Courbure Moyenne Nulle},
	publisher = {Project Gutenberg,},
	year = {2009},
	address = {Salt Lake City, UT :},
	note = {Release date is 2009-08-26},
	url = {https://www.gutenberg.org/ebooks/29805}
}