Hung, Nguyen Manh, Dang Ngoc Thuy, Dang Tuan Nhat, and Bien Van Trang. “Evaluation of Oil-Based Mud Contamination in Reservoir Fluids and Calculation of Uncontaminated Fluid”. Petrovietnam Journal 10 (January 30, 2015): 38-41. Accessed January 13, 2026. http://www.pvj.com.vn/index.php/TCDK/article/view/434.