TY - JOUR TI - Advancing logistics and resource management quality through twostage tandem queues and single vacation techniques AU - KEERTHIKA, R. AU - NIRANJAN, S.P. JO - Sigma Journal of Engineering and Natural Sciences PY - 2025 VL - 43 SP - 505 EP - 512 DO - 10.14744/sigma.2025.00039 ER -