Nguyen Thi Thanh Tu, Nguyen Huy Hung, and Nguyen Minh Quy. “RESEARCHING, BUILDING NETWORK ACTIVITIES AND SECURITY MONITORING SYSTEM FOR UNIVERSITIES BASE ON OPEN SOURCE”. UTEHY Journal of Applied Science and Technology, Vol. 9, Apr. 2020, pp. 38-43, http://tapchi.utehy.edu.vn/index.php/jst/article/view/299.