Nehiri, Nissrin, and Noura Aknin. “A Proposed Learner’s Data Model: Integrating Informal Learning and Enhancing Personalization and Interoperability”. International Journal of Emerging Technologies in Learning (iJET) 16, no. 08 (April 23, 2021): pp. 173–187. Accessed March 28, 2024. https://online-journals.org/index.php/i-jet/article/view/19833.