Nguyen, Hien D., Dung A. Tran, Huan P. Do, and Vuong T. Pham. 2020. “Design an Intelligent System to Automatically Tutor the Method for Solving Problems ”. International Journal of Integrated Engineering 12 (7): 211-23. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/7276.