Luan, N. T., Hanh, N. M., Ha, N. T. and Ha, P. T. T. (2014) “Optimal coal import solutions for Petrovietnam’s coal-fired power plants”, Petrovietnam Journal, 20, pp. 45-52. Available at: https://pvj.vn/index.php/TCDK/article/view/549 (Accessed: 19September2025).