Performance Evaluation of a Single-Server Queueing System with Correlated Arrivals, Two-Tier Service Structure, Random Breakdowns and Phase-Type Repairs. - Gurulakshmi, G. Archana Alias; Haghighi, Aliakbar Montazer; Ayyappan, G.; Arulmozhi, N.; Aishwarya, Natarajan (Mathematics (2227-7390), 2026)