---
title: "Bibliography"
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source: "https://docs.magma-maths.org/ModularArithmeticGeometry/CongruenceSubgroupsOfPSL2R/bibliography.md"
part: "Modular Arithmetic Geometry"
chapter: "Congruence Subgroups of ${\\operatorname{PSL}}_2({\\mathbb{R}})$"
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  - {"title": "Magma Handbook", "source": "../../index.md"}
  - {"title": "Modular Arithmetic Geometry", "source": "../index-modular-arithmetic-geometry.md"}
  - {"title": "Congruence Subgroups of ${\\operatorname{PSL}}_2({\\mathbb{R}})$", "source": "index-congruence-subgroups-of-psl2-r.md"}
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---

# Bibliography

<a id="cite-kulkarni"></a>
- **[Kul91]** Ravi S. Kulkarni. An arithmetic-geometric method in the study of the subgroups of the modular group. *Amer. J. Math.*, 113(6):1053–1133, 1991.
<a id="cite-fundomain-java"></a>
- **[Ver00]** H. A. Verrill. Fundamental domain drawing program. http://hverrill.net/fundomain/, 2000.