ETAYO, J. J.; MARTÍNEZ, E. Fuchsian groups generated by half-turns and geometrical characterization of hyperelliptic and symmetric Riemann surfaces. MATHEMATICA SCANDINAVICA, [S. l.], v. 95, n. 2, p. 226–244, 2004. DOI: 10.7146/math.scand.a-14457. Disponível em: https://www.mscand.dk/article/view/14457. Acesso em: 29 apr. 2024.