Pham, Hong Que, Thi Ngoc Phuong Bui, and Thi Thuy Doan. 2015. “New Findings from Pre-Cenozoic Basement Rock in Song Hong Basin and Their Relation to Petroleum Formation”. Petrovietnam Journal 12 (December), 22 - 27. http://pvj.vn/index.php/TCDK/article/view/739.