Cimen, Erkan, and Gabil M. Amiraliyev. “A Uniform Convergent Method for Singularly Perturbed Nonlinear Differential-Difference Equation”. Journal of Informatics and Mathematical Sciences 9, no. 1 (August 10, 2017): 191–199. Accessed April 29, 2024. https://www.rgnpublications.com/journals/index.php/jims/article/view/565.