Juan E. Napoles Valdes, Luciano M. Lugo Motta Bittencurt, & Paulo M. Guzman. (2015). 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, 3(4 - E), 15–21. Retrieved from http://ijmaa.in/index.php/ijmaa/article/view/521