Nakayama, Minoru, H. Kanazawa, and H. Yamamoto. “Detecting Incomplete Learners in a Blended Learning Environment Among Japanese University Students”. International Journal of Emerging Technologies in Learning (iJET) 4, no. 1 (November 15, 2008): pp. 47–51. Accessed January 21, 2022. https://online-journals.org/index.php/i-jet/article/view/659.