Beardon, Alan F. The geometry of discrete groups / Alan F. Beardon. - New York : Springer-Verlag, c1983. - xii, 337 p. : ill. ; 24 cm. - Graduate texts in mathematics ; 91 . Includes index. Bibliography: p. [329]-333. ISBN: 9781461270225 LCCN: 82019268 Subjects--Topical Terms: Discrete groups.Isometrics (Mathematics)Möbius transformations.Geometry, Hyperbolic. Dewey Class. No.: 512.2 / BEA