@book{286342,
	author = {Fenchel, W. and Nielsen, Jakob, and ProQuest (Firm)},
	title = {Discontinuous groups of isometries in the hyperbolic plane},
	publisher = {Walter de Gruyter,},
	year = {2003.},
	series = {De Gruyter studies in mathematics ;},
	address = {Berlin ;},
	url = {https://ebookcentral.proquest.com/lib/kuct-ebooks/detail.action?docID=934895}
}