IZQUIERDO, M. On Klein Surfaces and Dihedral Groups. MATHEMATICA SCANDINAVICA, [S. l.], v. 76, p. 221–232, 1995. DOI: 10.7146/math.scand.a-12538. Disponível em: https://www.mscand.dk/article/view/12538. Acesso em: 28 apr. 2024.