Norhayati Rosli, Muhammad Bilal, Iftikhar Ahmad. “Solution of Pantograph Differential Equations by Collocation Method Using Ortho Exponential Polynomial ”. International Journal of Advanced Science and Technology 29, no. 10s (May 9, 2020): 179 - 187. Accessed May 2, 2024. http://sersc.org/journals/index.php/IJAST/article/view/14406.