Shweta Upadhyaya. “A Batch Arrival Retrial Queue With Bernoulli Vacation Policy and Server Breakdown”. Journal of International Academy of Physical Sciences 14, no. 2 (June 15, 2010): 169–180. Accessed May 21, 2024. https://www.iaps.org.in/journal/index.php/journaliaps/article/view/310.