Trung, Phan Ngoc, Nguyen Huu Trung, and Pham Kieu Quang. 2014. “Orientation for Incentive Mechanisms and Policies to Encourage Petroleum Contractors to Invest in Enhanced Oil Recovery Projects”. Petrovietnam Journal 8 (August), 52-58. https://pvj.vn/index.php/TCDK/article/view/589.