A. A. Salama, Mohamed Eisa, S.A.ELhafeez, and M. M. Lotfy, “Review of Recommender Systems Algorithms Utilized in Social Networks based e-Learning Systems & Neutrosophic System”, Neutrosophic Sets Syst., vol. 8, pp. 32–41, May 2015, Accessed: Apr. 04, 2025. [Online]. Available: https://fs.unm.edu/nss8/index.php/111/article/view/488