Lan, Nguyen Thi Tuyet, Nguyen Thu Huyen, Nguyen Thi Thanh, Le Hoai Nga, Ho Thi Thanh, and Phi Ngoc Dong. 2013. “A Study of the Geochemical Characteristics of Phu Khanh Basin”. Petrovietnam Journal 3 (March), 13-20. http://tapchidaukhi.vn/index.php/TCDK/article/view/646.