Ma, Xiaofeng, Qiang Ji, and Yushui Xiao. “Research on the Development of Self-Built Online Open Courses in the New Era”. Learning & Education 9, no. 2 (November 10, 2020): 82-84. Accessed January 30, 2025. https://ojs.piscomed.com/index.php/L-E/article/view/1408.