Dung, Dinh Van, Dinh Thi Kim Hao, and Hoang Huu Tinh. “Evaluating the efficiency of slope-farming in Nghia Dan district, Nghe An province, Vietnam”. Asia-Pacific Journal of Science and Technology 22, no. 1 (April 26, 2017): APST–22. accessed January 8, 2026. https://so01.tci-thaijo.org/index.php/APST/article/view/84849.