NÄÄTÄNEN, M. Regular n-gons and Fuchsian groups. Annales Fennici Mathematici, [S. l.], v. 7, n. 2, p. 291–300, 1982. DOI: 10.5186/aasfm.1982.0724. Disponível em: https://afm.journal.fi/article/view/134448. Acesso em: 25 nov. 2024.