Deng, Haiyan, and Chunyan Li. “A Hadoop-Based Online Teaching Model of ‘VisibleBody’”. International Journal of Emerging Technologies in Learning (iJET) 16, no. 11 (June 4, 2021): pp. 46–58. Accessed November 22, 2024. https://online-journals.org/index.php/i-jet/article/view/23219.