Nguyen Anh Duc, Nguyen Thi Thuy Tien, and Nguyen Huong Chi. “Impacts of Crude Oil Prices and Covid-19 Pandemic on Petrovietnam’s Production and Business”. Petrovietnam Journal 110 (December 7, 2020): 26 - 36. Accessed June 19, 2026. https://tapchidaukhi.com/index.php/TCDK/article/view/376.