Anh, Nguyen Thi Lan, Ngo Thi Mai Hanh, Hoang Manh Anh, and Nham Phong Tuan. “Responsibility and Authority in Management of Overseas Upstream Investment and Application for Petrovietnam”. Petrovietnam Journal 70 (July 31, 2013): 48-5. Accessed October 26, 2025. http://www.tapchidaukhi.vn/index.php/TCDK/article/view/691.