Hussein, Ahmed J. “Differential Quadrature Method for Solving the Linear and Nonlinear Klein - Gordon Equation”. University of Thi-Qar Journal of Science 4, no. 3 (July 5, 2019): 166-174. Accessed August 17, 2026. https://www.jsci.utq.edu.iq/index.php/main/article/view/649.