BUI DUC THO; NGUYEN HOANG DIEP; DO THI THU TRANG; NGUYEN THI HAI NANG; NGO THANH HUYEN; MINH-TIEN NGUYEN; VAN-HAU NGUYEN. AN INVESTIGATION OF VIETNAMESE DOCUMENT CLASSIFICATION. UTEHY Journal of Science and Technology, v. 27, p. 105-110, 12 Oct. 2020.