A. Baskar and Saravanarajan, M.C. 2024. Analyzing Feedback <i>M</i>/<i>G</i>/1 Double Retrial Orbit with Two-Phase Optional Service and Repair under Working Vacation Policy. Contemporary Mathematics. 5, 4 (Dec. 2024), 5795–5827. DOI:https://doi.org/10.37256/cm.5420245813.