Nguyen , Tan Tran Minh Khang, and Hue Nuong Tran. “Automated Systems for Educational Timetabling Problems”. Journal of Technical Education Science 6, no. 2 (June 29, 2011): 1–10. Accessed May 23, 2026. https://www.jte.edu.vn/index.php/jte/article/view/868.