Hoang Thi Phuong, Doan Van Thuan, Hoang Thi Dao, Cao Thi Thu Hang, Vo Hong Thai, and Pham Thu Trang. “Investment in Construction of Oil and Gas Projects - Obstacles Viewed from Legal Perspective”. Petrovietnam Journal 80 (August 12, 2020): 49 - 59. Accessed November 27, 2025. https://pvj.vn/index.php/TCDK/article/view/333.