1 |
H. Tietze, Uber Konvexheit im kleinen und im groBen und uber gewisse den Punkten einer Menge zugeordnete Dimensionszahlen, Math. Z. 28 (1928), no. 1, 697–707
|
2 |
D. Zagier, Modular parametrizations of elliptic curves, Canad. Math. Bull. 28 (1985), no. 3, 372–384
|
3 |
A. F. Beardon, The Geometry of Discrete Groups, Graduate Texts in Mathematics, 91. Springer-Verlag, New York, 1983
|
4 |
L. Ford, Automorphic Functions, McGraw-Hill, New York, 1929
|
5 |
H. Iwaniec, Topics in Classical Automorphic Forms, Graduate Studies in Mathematics, 17. American Mathematical Society, Providence, RI, 1997
|
6 |
R. S. Kulkarni, An arithmetic-geometric method in the study of the subgroups of the modular group, Amer. J. Math. 113 (1991), no. 6, 1053–1133
|
7 |
R. A. Rankin, The Modular Group and its Subgroups, Ramanujan Institute, Madras, 1969
|
8 |
O. Yayenie, H-convex standard fundamental domain of a subgroup of a modular group, Ramanujan J. 16 (2008), no. 3, 305–320
DOI
|
9 |
J. Lehner, Discontinuous Groups and Automorphic Functions, American Mathematical Society, Providence, R.I., 1964
|