Qi, Aili, Yunsong Wang, and Chengchun Shen. “Application of Courseware Based on Information Retrieval Technology”. International Journal of Emerging Technologies in Learning (iJET) 11, no. 03 (March 30, 2016): pp. 32–36. Accessed May 3, 2024. https://online-journals.org/index.php/i-jet/article/view/5346.