G. B. . Ekal, . V. L. C. Jackel, K. Ghazali, and J. . Sulaiman, “Numerical solution of the porous medium equation with source terms using the Four-Point Newton-EGKSOR iterative method combined with wave variable transformation”, J. Adv. Res. Appl. Sci. Eng. Tech., pp. 39–48, Oct. 2024.