D. Nguyen, T. T. Pham, and V. T. Do, “Road Maintenance Administration in Vietnam: Problems and Solutions”, ijscet, vol. 12, no. 5, pp. 39–52, Jan. 2022, Accessed: Aug. 13, 2026. [Online]. Available: https://journal.uthm.edu.my/index.php/IJSCET/article/view/10496