“Phase Fitted And Amplification Fitted Of Runge-Kutta-Fehlberg Method Of Order 4(5) For Solving Oscillatory Problems”. Baghdad Science Journal 17, no. 2(SI) (June 22, 2020): 0689. Accessed May 3, 2024. https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/4024.