Ahmed, F. I., Alemu, S. D., & Tilahu, G. T. (2022). A Single Server Markovian Queue with Single Working Vacation, State Dependent Reneging and Retention of Reneged Customers. Ethiopian Journal of Education and Sciences, 17(1), 51-69. Retrieved from https://ejhs.ju.edu.et/index.php/ejes/article/view/3976