Monotone Flows with Dense Periodic Orbits. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 12, n. 4, p. 1350–1359, 2019. DOI: 10.29020/nybg.ejpam.v12i4.3534. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/3534.. Acesso em: 5 may. 2024.