Xu, Shuoyan. “Recommendation of Online Learning Resources for Personalized Fragmented Learning Based on Mobile Devices”. International Journal of Emerging Technologies in Learning (iJET) 17, no. 03 (February 18, 2022): pp. 34–49. Accessed November 23, 2024. https://online-journals.org/index.php/i-jet/article/view/29427.