Le Trung Hieu, Pham Quoc Hung, Nguyen Vinh Quy, and Chu Ba Thanh. “COMPARATIVE STUDY OF CLASSIFICATION METHODS USED FOR IDENTIFYING VIETNAMESE – ENGLISH – FRENCH”. UTEHY Journal of Applied Science and Technology, Vol. 15, Oct. 2017, pp. 43-48, http://tapchi.utehy.edu.vn/index.php/jst/article/view/162.