NAGAR, Anima; SINGH, Pradeep. Finiteness in polygonal billiards on hyperbolic plane. Topological Methods in Nonlinear Analysis, [S. l.], v. 58, n. 2, p. 481–520, 2021. DOI: 10.12775/TMNA.2021.003. Disponível em: https://apcz.umk.pl/TMNA/article/view/36416. Acesso em: 4 jul. 2025.