S. Restuasih, E. W. Gustany, F. R. Wijayanti, A. P. Ariyani, and N. M. Fitria, “Sensitivity Analysis of a Single-Server Fuel Queue System Using the M/M/1 Model: A Case Study of a Pertamini Station”, J-GERS, vol. 4, no. 2, pp. 48–55, Dec. 2025.