Tian, Yuxin. “Personalized Allocation of English Teaching Resources through Weight Calculation Based on Term Frequency-Inverse Document Frequency”. International Journal of Emerging Technologies in Learning (iJET) 15, no. 10 (June 1, 2020): pp. 202–214. Accessed May 5, 2024. https://online-journals.org/index.php/i-jet/article/view/13335.