Kailash C. Madan. “On Optional Deterministic Server Vacations in a Batch Arrival Queueing System With a Single Server Providing First Essential Service Followed by One of the Two Types of Additional Optional Service”. Malaya Journal of Matematik 4, no. 01 (January 1, 2016): 25–36. Accessed July 16, 2024. https://www.malayajournal.org/index.php/mjm/article/view/509.