Pham Thanh Dat, and Le Thong Nhat. “Establishment and Application of Environmental Performance Indicators (EPIS) to Enhance the Efficiency of Environmental Management in Refining and Petrochemical Field”. Petrovietnam Journal 70 (July 31, 2018): 59-65. Accessed September 15, 2025. https://pvj.vn/index.php/TCDK/article/view/74.