S. Z. Mohamad and M. Mohamad, “The Chebyshev Tau Method to Solve Linear Klein Gordon Equation”, EKST, vol. 2, no. 1, pp. 342–351, Aug. 2022, Accessed: Aug. 15, 2026. [Online]. Available: https://periodical.uthm.edu.my/index.php/ekst/article/view/5342