Bouihi, Bouchra, and Mohamed Bahaj. “Ontology and Rule-Based Recommender System for E-Learning Applications”. International Journal of Emerging Technologies in Learning (iJET) 14, no. 15 (August 1, 2019): pp. 4–13. Accessed November 22, 2024. https://online-journals.org/index.php/i-jet/article/view/10566.