Iversen, Birger Hyperbolic geometry Birger Iversen - Cambridge : Cambridge University Press, 1992 - xiv, 298 p. : il. - London Mathematical Society student texts ; 25 . Bibliografía: p. 292-294 ISBN: 0521435285 Subjects--Topical Terms: GEOMETRIA HIPERBOLICA Dewey Class. No.: 516.9 / I12