Asymptotic integration of second-order differential equations: Levinson-Weyl theory, Poincaré-Perron property, Lyapunov type numbers, and dichotomy. NS [Internet]. 2010 May 25 [cited 2025 Sep. 13];17(2). Available from: https://nonlinearstudies.com/index.php/nonlinear/article/view/372