@book{94061,
	author = {Radzevich, S. P.,},
	title = {Geometry of surfaces :},
	publisher = {Springer,},
	year = {2020},
	address = {Cham :},
	edition = {Second Edition},
	url = {https://link-springer-com.libraryumpsa.idm.oclc.org/book/10.1007/978-3-030-22184-3}
}