Hussain, Kasim A., and Waleed J. Hasan. “Improved Runge-Kutta Method for Oscillatory Problem Solution Using Trigonometric Fitting Approach”. Ibn AL-Haitham Journal For Pure and Applied Sciences 36, no. 1 (January 20, 2023): 345–354. Accessed November 22, 2024. https://jih.uobaghdad.edu.iq/index.php/j/article/view/2963.