References
- Beardon , A. 1983 . The Geometry of Discrete Groups , Springer-Verlag .
- Martin , G. J. 1989 . Stability and extremality in J⊘rgensen's inequality . Complex Variables , 12 : 277 – 282 .
- Gehring , F. W. and Martin , G. J. 1989 . Iteration theory and inequalities for Kleinian groups . Bull. Amer. Math. Soc. , 21 : 57 – 63 .
- Gehring , F. W. and Martin , G. J. 1991 . Inequalities for Möbius transformations and discrete groups . J. Reine Angew. Math , 418 : 31 – 76 .
- Gehring , F. W. and Martin , G. J. 1991 . Commutators, collars and the geometry of Möbius groups . J. d'Analyse Math. , 418 to appear
- Greenberg , L. 1963 . Maximal Fuchsian groups . Bull. Amer. Math. Soc. , 69 : 569 – 573 .
- Greenberg , L. 1977 . “ Finltcness theorem for Fuchsian and Kleinian groups ” . In Discrete group and automorphic functions. , Vol. 1 , 199 – 257 . Academic Press .
- J⊘rgensen , T. 1976 . On diacrele groups of Möbius transformations . Amer. J Math , 98 : 739 – 749 .
- J⊘rgensen , T. 1977 . Compact 3–manifolds of constant negative curvature fibering over the circle . Ann. Math. , 106 : 61 – 72 .
- Magnus , W. 1977 . Noneuclidean Tesselations and Their Groups , Academic Press .
- Pommmerenke , Ch. and Purzitsky , N. “ On some universal bounds for Fuchsian groups ” . In Studies in Pure Mathematics 561 – 575 .
- Rosenberger , G. 1978 . Von Untergruppen der Triangel-Untergruppen . Illinois J. Math. , 22 : 404 – 413 .
- Rosenberger , G. 1986 . All generating pairs of two generator Fuchsian groups . Arch. Math. , 46 : 198 – 204 .
- Singerman , D. 1972 . Finitely maximal Fuchsian groups . J. London Math. Soc. , 6 : 29 – 38 .
- Tan , D. 1989 . On two–generator discrete groups of Möbius transformations . Proc. Amer. Math. Soc. , 106 : 763 – 770 .