Kumar N, Savita. Threshold-Based Recovery in Queue Theory: Addressing Server Breakdowns, Catastrophic Events, and Customer Reneging. JRSS [Internet]. 2025 Feb. 18 [cited 2026 Apr. 22];17(02):435–452. Available from: https://journals.riverpublishers.com/index.php/JRSS/article/view/26851