Zhang, Yaqiong, Jiyan Lin, and Hui Zhang. “A Hierarchical Teaching Mode of College Computer Basic Application Course Based on K-Means and Improved PSO Algorithm”. International Journal of Emerging Technologies in Learning (iJET) 11, no. 10 (October 27, 2016): pp. 53–58. Accessed April 19, 2024. https://online-journals.org/index.php/i-jet/article/view/5909.