Abassy, Tamer. “Piecewise Analytic Method (PAM) Is a New Step in the Evolution of Solving Nonlinear Differential Equation”. International Journal of Applied Mathematical Research 8, no. 1 (May 6, 2019): 12–19. Accessed April 30, 2024. https://sciencepubco.com/index.php/ijamr/article/view/24984.