Y. AL-Bayati, A., J. Al-Sawoor, A. and A. Samarji, M. 1999. The Derivation of Convergence Analysis for the Multistage Adomian Decomposition Method for solving the Autonomous Van der Pol system. Journal of Education and Science. 24, 3 (Nov. 1999), 133–148. DOI:https://doi.org/10.33899/edusj.1999.58798.