Nimai Sarkar, Mausumi Sen, Dipankar Saha. “A New Approach for Numerical Solution of Singularly Perturbed Volterra Integro-Differential Equation”. Design Engineering (August 19, 2021): 9629 - 9641. Accessed May 4, 2024. http://thedesignengineering.com/index.php/DE/article/view/3541.