Abdullah, Aslam. “Comparative Study of the Condition for Non-Oscillatory Solution of a Singularly Perturbed Problem on Uniform and Piecewise-Uniform Meshes”. CFD Letters 12, no. 8 (January 16, 2021): 108–120. Accessed April 25, 2024. https://www.akademiabaru.com/submit/index.php/cfdl/article/view/3282.