Phan, Truong, Sinh Tran, and Thuy Pham. “Assessing State Management of the Environment in Thanh Sơn District, Phu Tho Province”. VNUHCM Journal of Economics - Law and Management 6, no. 2 (June 18, 2022): 2727-2738. Accessed August 14, 2025. http://stdjelm.scienceandtechnology.com.vn/index.php/stdjelm/article/view/962.