Sánchez-Sordo, José Manuel. “Data Mining Techniques for the Study of Online Learning from an Extended Approach”. Multidisciplinary Journal for Education, Social and Technological Sciences 6, no. 1 (May 20, 2019): 1–24. Accessed June 13, 2026. https://polipapers.upv.es/index.php/MUSE/article/view/11482.