Boundary Fixed Homeomorphisms of 2-Manifolds with Boundary. Global Journal of Science Frontier Research, [S. l.], v. 11, n. 8, p. 13–15, 2011. Disponível em: https://www.journalofscience.org/index.php/GJSFR/article/view/345. Acesso em: 14 aug. 2026.