Tam, Le Trung, Cu Minh Hoang, and Pham Van Tuan. 2014. “Litho-Sedimentological Characteristics of Pre-Cenozoic Carbonate in Ham Rong Field, Northeast of Song Hong Basin”. Petrovietnam Journal 5 (May), 23-30. http://www.tapchidaukhi.com/index.php/TCDK/article/view/565.