JUAN E. NAPOLES VALDES; LUCIANO M. LUGO MOTTA BITTENCURT; PAULO M. GUZMAN. A Note on the Continuability of Solutions of a Perturbed Second Order Nonlinear Differential Equation of Lienard Type. International Journal of Mathematics And its Applications, [S. l.], v. 3, n. 4 - E, p. 15–21, 2015. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/521. Acesso em: 19 may. 2024.