1. Bezdek, K.: Ein elementarer Beweis für die isoperimetrische Ungleichung in der Euklidischen und hyperbolischen Ebene. Ann. Univ. Sci. Budapest. Eötvös Sect. Math. 27, 107–112 (1984)
2. Carroll, C., Jacob, A., Quinn, C., Walters, R.: On generalizing the Honeycomb theorem to compact hyperbolic manifolds and the sphere. Report of SMALL Geometry Group’06, Williams College (Aug. 2006). https://sites.williams.edu/Morgan/ongeneralizing-the-honeycomb-theorem-to-compact-hyperbolic-manifolds-and-thesphere/
3. Choe, J.: On the existence and regularity of fundamental domains with least boundary area. J. Differ. Geom. 29(3), 623–663 (1989). https://doi.org/10.4310/jdg/1214443065
4. Cox, C.: The Honeycomb problem on hyperbolic surfaces (Aug. 2005). https://sites.williams.edu/Morgan/the-honeycomb-problem-on-hyperbolic-surfaces/
5. Cox, C.: The Honeycomb problem on hyperbolic surfaces (July 2011). https://sites.williams.edu/Morgan/the-honeycomb-problem-on-hyperbolic-surfaces/