“Solving Two Dimensional Coupled Burger’s Equations and Sine-Gordon Equation Using El-Zaki Transform-Variational Iteration Method”. Al-Nahrain Journal of Science 24, no. 2 (June 27, 2021): 41–47. Accessed November 22, 2024. https://anjs.edu.iq/index.php/anjs/article/view/2390.