Pham, Hong Que, Thi Ngoc Phuong Bui, and Thi Thuy Doan. “New Findings from Pre-Cenozoic Basement Rock in Song Hong Basin and Their Relation to Petroleum Formation”. Petrovietnam Journal 120 (December 27, 2015): 22 - 27. Accessed May 25, 2026. http://pvj.vn/index.php/TCDK/article/view/739.