Dam, Mai Hoang, Nguyen Thi Tham, and Nguyen Hoai Chung. “Characterisation of Oligocene Palynomorphs in the Cuu Long Basin and Its Stratigraphic Significance”. Petrovietnam Journal 40 (April 30, 2018): 18-31. Accessed April 17, 2026. http://www.pvj.com.vn/index.php/TCDK/article/view/363.