Nguyen Kieu Hien, Nguyen Huu Mong, Ha Gia Son, and Tran Ngoc Tuan. “A LEAST SQUARES METHOD IN FORECASTING MODELS”. UTEHY Journal of Science and Technology 13 (April 12, 2017): 69-73. Accessed April 25, 2024. http://tapchi.utehy.edu.vn/index.php/jst/article/view/216.